My Tech Notes: 2016

TextMate 2: uses spaces instead of tabs and set tab size

Edit ~/.tm_properties and put:

tabSize = 2
softTabs = true
softWrap = true

[ source.java ]
tabSize = 4
softTabs = true

[ source.python ]
tabSize = 4
softTabs = true

[ source.tcl ]
tabSize = 4
softTabs = true

Uploading Multiple Files to Google Drive with Google App Script

Form.html Note: Replace rootFolderId with the id of destination folder on your Google Drive.
Code.gs

Enable livepatch on Ubuntu Linux 16.04 LTS

Install snapd:
```
sudo apt-get install snapd
```
Install the canonical-livepatch snap:
```
sudo snap install canonical-livepatch
```
Go to https://ubuntu.com/livepatch and retrieve your livepatch token

Enable the service with your token:

sudo /snap/bin/canonical-livepatch enable [TOKEN]

You can check the status at any time using:

sudo /snap/bin/canonical-livepatch status --verbose

xargs argument position

echo "foo" | xargs -i echo {} "bar"

produces:

foo bar

xargs with multiple commands

Example 1:

find "/Users/wilson/Documents" -type f -print0 | xargs -0 -i bash -c 'grep -L "{}" /tmp/document-list.csv || echo "{}"'

Example 2:

cat a.txt | xargs -I % sh -c 'echo %; ls %'

SFC Game: Contra III - The Alien Wars Cheats & Codes

Passwords

Here are some passwords for the stages, across the various difficulty settings. (Note: The game ends after Level 3 on easy.)
Easy:
Level 2 - HMH4
Level 3 - HMRK

Normal:
Level 2 - MDMG
Level 3 - MDWC
Level 4 - 1ZKC
Level 5 - M2P5

Hard:
Level 2 - J3YS
Level 3 - JJ34
Level 4 - NCR1
Level 5 - JKCG

Maniac: Level 2 - G43Q
Level 3 - G4SM
Level 4 - K31Y
Level 5 - GPM2

Infinite Lives - B32R

Skip Stage - H2F2 - Now while playing, press START to skip to the next stage.

Play Stage 4 on Easy - 21LN
70条命：标题画面按2P手柄（CBA右左）三次。
选关：标题画面按2P手柄（左右ABC）三次。
加满武器：游戏中1P暂停，按（上上下下A上上下下B上上下下C）。

注意，这里的标题画面是指一开始，有‘魂斗罗’字样，可以选择1P和2P 的那个标题画面。
如果秘技输入成功，会有一个男性的声音叫一声‘呀’的声效。

Mac OS X: install lxml

Install xcode first
Run the command:
```
xcode-select --install
```

Shell scripting: get the last argument


for last; do true; done
echo $last

Install MyTardis on Ubuntu Linux 16.04

Create a service user account for running MyTardis:
```
useradd -m -d /opt/mytardis -s /bin/bash tardis
```

Check out MyTardis from github:

cd /opt
sudo git clone -b master https://github.com/mytardis/mytardis.git
sudo chown tardis:tardis /opt/mytardis

Install required ubuntu packages:

sudo bash /opt/mytardis/install-ubuntu-requirements.sh

Setup virtualenv for tardis account:

sudo su tardis
source /usr/share/virtualenvwrapper/virtualenvwrapper.sh
mkvirtualenv --system-site-packages mytardis
pip install -U pip
echo "source /usr/share/virtualenvwrapper/virtualenvwrapper.sh" >> ~/.bashrc
echo "workon mytardis" >> ~/.bashrc
source ~/.bashrc

(As user 'tardis',) To work around this bleach bug, set html5lib version by adding line below to requirements.txt:
```
html5lib==0.9999999
```
remove billiard from requirements.txt or after installing the required packages, re-install celery package to downgrade billiard to 3.3.0.23. This is because the installed billiard 3.5.0.0 is installed and it causes celery failed to process any task. (Thread ResultHandler crashed: TypeError ...)
(As user 'tardis',) Install required Python packages:
```
cd /opt/mytardis
pip install -U -r requirements.txt
```

(As user 'tardis',) Initialize tardis/settings.py (as user 'tardis'):

cd /opt/mytardis
mv tardis/settings_changeme.py tardis/settings.py

add the following lines:

DATABASES['default']['ENGINE'] = 'django.db.backends.sqlite3'
DATABASES['default']['NAME'] = 'tardis_db'

(As user 'tardis',) Generate SECRET_KEY and save to tardis/settings.py:

echo "SECRET_KEY='`python mytardis.py generate_secret_key`'" >> tardis/settings.py

or to re-generate:

python -c "import os; from random import choice; key_line = '%sSECRET_KEY=\"%s\"  # generated from build.sh\n' % ('from tardis.default_settings import * \n\n' if not os.path.isfile('tardis/settings.py') else '', ''.join([choice('abcdefghijklmnopqrstuvwxyz0123456789\\!@#$%^&*(-_=+)') for i in range(50)])); f=open('tardis/settings.py', 'a+'); f.write(key_line); f.close()"

(As user 'tardis',) Initialize database:
```
python mytardis.py migrate
```

(As user 'tardis',) Create cache tables:

python mytardis.py createcachetable default_cache
python mytardis.py createcachetable celery_lock_cache

(As user 'tardis',) Collect static files and save to static/ directory under /opt/mytardis:
```
python mytardis.py collectstatic
```
(As user 'tardis',) Create superuser (as user 'tardis'):
```
python mytardis.py createsuperuser
```
(As user 'tardis',) Create var/store directory:
```
mkdir -p var/store
```
(As user 'tardis',) Start mytardis server:
```
python mytardis.py celeryd &
python mytardis.py runserver 0.0.0.0:8000
```
Note: 1) celeryd has to be started manually prior mytardis; 2) append 0.0.0.0:8000 to runserver command will make the server serve other hosts rather than only localhost:8000
Supervisor can be installed to auto-start celeryd and webserver...

Setup XNAT on Ubuntu 16.04

Create user xnat to run Tomcat service:

sudo useradd -u 6667 -d /opt/xnat -s /bin/bash xnat

Install PostgreSQL:
```
sudo apt-get install postgresql
```
then edit /etc/postgresql/9.5/main/postgresql.conf file:
```
standard_conforming_strings=off
```
, and restart PostgreSQL server:
```
sudo /etc/init.d/postgresql restart
```

Install Java 7
Current XNAT (v1.6.5) requires Java 7. Java 8 will NOT work. Type the commands below to install Java 7:

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer oracle-java7-set-default

Install Tomcat 7
Current XNAT v1.6.5 requires Tomcat7. However, DO NOT install tomcat7 from Ubuntu Repository. It was compiled with Java 8 and will cause this problem. Instead, you should download from offical Tomcat web site. Type the command below to install tomcat:
```
cd /opt
sudo wget http://apache.mirror.serversaustralia.com.au/tomcat/tomcat-7/v7.0.70/bin/apache-tomcat-7.0.70.tar.gz
sudo tar zxvf apache-tomcat-7.0.70.tar.gz
sudo ln -s /opt/apache-tomcat-7.0.70 /opt/tomcat7
sudo chown -R xnat:xnat /opt/apache-tomcat-7.0.70
sudo chown -R xnat:xnat /opt/tomcat7
```
then set startup scripts permissions:
```
sudo chmod +x /opt/tomcat7/bin/startup.sh
sudo chmod +x /opt/tomcat7/bin/shutdown.sh
```
and you need to set JAVA_OPTS in /opt/tomcat7/bin/catalina.sh and insert the following line at the start:
```
JAVA_OPTS="-XX:MaxPermSize=1024m -Xmx8192m"
```
NOTE: you need to set MaxPermSize and MaxHeapSize(Xmx) in JAVA_OPTS. Otherwise, OutOfMemoryError will occur when you load XNAT web app.
Install Maven:
```
sudo apt-get install maven
```

Download and extract XNAT 1.6.5:

cd /opt
sudo wget ftp://ftp.nrg.wustl.edu/pub/xnat/xnat-1.6.5.tar.gz
sudo tar zxvf xnat-1.6.5.tar.gz
sudo chown -R xnat:xnat /opt/xnat

Prepare XNAT directories:

sudo mkdir /data/xnat/archive
sudo mkdir /data/xnat/prearchive
sudo mkdir /data/xnat/ftp
sudo mkdir /data/xnat/cache
sudo mkdir /data/xnat/build

NOTE: '/data/xnat' should be the mount point for large storage for XNAT.

Set up environment variables for xnat user, by editting .bashrc file:

sudo su xnat
vi ~/.bashrc

add the following:

# JAVA
export JAVA_HOME=/usr/lib/jvm/java-7-oracle
export PATH=$JAVA_HOME/bin:$PATH

# Tomcat
export TOMCAT_HOME=/opt/tomcat7
export PATH=$PATH:$TOMCAT_HOME/bin

# XNAT
export XNAT_HOME=/opt/xnat
export PATH=$PATH:$XNAT_HOME/bin

Create XNAT database user xnat01:
```
sudo su postgres
createuser -U postgres -S -D -R -P xnat01
```
Note: set and remember the password for db user xnat01, you will need it in the XNAT build.properties file.

Create XNAT database:

sudo su postgres
createdb -U postgres -O xnat01 xnat

Edit /opt/xnat/build.properties:

su xnat
cd /opt/xnat
cp build.properties.sample build.properties
vi build.properties

and the content should be like below:

maven.appserver.home = /opt/tomcat7

xnat.site.title=XNAT
xdat.project.name=xnat
xdat.project.db.name=xnat
xdat.project.db.driver=org.postgresql.Driver
xdat.project.db.connection.string=jdbc:postgresql://localhost/xnat
xdat.project.db.user=xnat01
xdat.project.db.password=XXXXXXX
xdat.archive.location=/data/xnat/archive
xdat.prearchive.location=/data/xnat/prearchive
xdat.cache.location=/data/xnat/cache
xdat.ftp.location=/data/xnat/ftp
xdat.build.location=/data/xnat/build
xdat.mail.server=mail.yourdomain.org
xdat.mail.port=25
xdat.mail.protocol=smtp
xdat.mail.username=
xdat.mail.password=
xdat.mail.admin=xnat-admin@yourdomain.org
xdat.url=http://192.168.100.12:8080/xnat
xdat.require_login=true
xdat.enable_new_registrations=false
xdat.security.channel=any
xdat.enable_csrf_token=true

Note: xdat.url need to be set to the public ip or address instead of localhost if you want the XNAT server to be accessed from other computers.

Edit project.properties file. and replace the 'maven.repo.remote' line with
```
maven.repo.remote=https://nrgxnat.artifactoryonline.com/nrgxnat/xnat-maven1
```
NOTE: You need to do this because the offical XNAT maven repository is down.
Run setup.sh script to build:
```
sudo su xnat
cd /opt/xnat
bin/setup.sh
```
Create Database tables & views:
```
cd /opt/xnat
psql xnat01 -h localhost -d xnat -f deployments/xnat/sql/xnat.sql
```
Note: you need supply the password for db user xnat01.

Store initial security settings:

sudo su xnat
cd /opt/xnat/deployments/xnat
StoreXML -project xnat -l security/security.xml -allowDataDeletion true

Store Example Custom Variable Sets:

sudo su xnat
cd /opt/xnat/deployments/xnat
StoreXML -dir ./work/field_groups -u admin -p admin -allowDataDeletion true

Deploy the web app

sudo su xnat
cd /opt/xnat
bin/update.sh -Ddeploy=true

Now start Tomcat7 server:

sudo su xnat
/opt/tomcat7/bin/startup.sh

When open the xnat web page in browser the first name, it will take a very long time to load as it is loading the XNAT web app in Tomcat.

Key points

Install JAVA 7. Java 8 does not work.
Download Tomcat 7 binary from offical Tomcat web site. DO NOT install from Ubuntu Repository.
Set Java MaxPermSize and Xmx(MaxHeapSize) in JAVA_OPTS for Tomcat7 startup script catalina.sh. Missing this step will cause OutOfMemoryError when load XNAT web app
Official XNAT maven repository site is down. Edit project.properties to replace it with https://nrgxnat.artifactoryonline.com/nrgxnat/xnat-maven1
Tomat7 server is run as xnat user.

Hotmail (Outlook) denied POP3 access from Gmail

Recently, my Gmail failed to access my hotmail via POP3:

Server denied POP3 access for the given username and password.
Please contact Microsoft's Support Team for more information on POP access.
Server returned error: "Authentication failure: unknown user name or bad password. [Error="ProxyNotAuthenticated" AuthResult=0 Proxy=KL1PR0201MB1655.apcprd02.prod.outlook.com:1995:SSL]"

It was working fine for a few years. Suddenly stopped working. I searched and found the reason: Microsoft turned off POP3 access on my account without any notification. So turning it back on solved the problem:
For more details, see here

Mount CIFS/SMB (Windows) Share on Linux

Install CIFS/Samba client

sudo apt-get install cifs-utils

Manual mount

sudo mount -t cifs -o domain=yourdomain,username=yourusername //your-cifs-server.your-domain.org/yourshare /mnt/yourshare

Auto mount

Create a credentials file at /etc/cifs-credentials

domain=yourdomain
username=yourusername
password=yourpassword

Edit /etc/fstab as root (or sudo)

//your-cifs-server.your-domain.org/yourshare /mnt/yourshare cifs credentials=/etc/cifs-credentials  0 0

```
sudo mount -a
```

OMERO systemd units

Systemd unit for OMERO.server:

cat /lib/systemd/system/omero.service

[Unit]
Description=OMERO Server
Wants=remote-fs.target postgresql.service
After=remote-fs.target postgresql.service
   
[Service]
Type=forking
ExecStart=/etc/init.d/omero start
ExecStop=/etc/init.d/omero stop

[Install]
WantedBy=multi-user.target

Systemd unit for OMERO.web:

cat /lib/systemd/system/omero-web.service

[Unit]
Description=OMERO web
Wants=nginx.service omero.service
After=nginx.service omero.service
   
[Service]
Type=forking
ExecStart=/etc/init.d/omero-web start
ExecStop=/etc/init.d/omero-web stop

[Install]
WantedBy=multi-user.target

OMERO.web startup script /etc/init.d/omero-web

OMERO.server startup script /etc/init.d/omero

Mediaflux startup script to run the server as non-root user

The configuration file should be saved to /etc/mediaflux:

export MFLUX_HOME=/opt/mediaflux
export MFLUX_DOMAIN=system
export MFLUX_USER=manager
export MFLUX_TRANSPORT=https
export MFLUX_PORT=8443
export MFLUX_UMASK=0007
export MFLUX_ADMIN=mflux

The startup script modified from $MFLUX_HOME/bin/unix/mediaflux should be saved to /etc/init.d/mediaflux

sudo cp $MFLUX_HOME/bin/unix/mediaflux /etc/init.d/mediaflux

sudo vi /etc/init.d/mediaflux

Note: the following changes is required by systemd on Ubuntu Linux 16.04:

#!/bin/bash

# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:  2 3 4 5
# Default-Stop: 0 1 6

Note: the following changes is to run the sevice as user mflux rather than root:

start-stop-daemon --start --background --umask $MFLUX_UMASK -c $MFLUX_ADMIN --exec "${JAVA}" -- -jar $MFLUX_HOME/bin/aserver.jar application.home=$MFLUX_HOME nogui $DEBUG >> $MFLUX_HOME/volatile/logs/unix_start.log&

Start Mediaflux server on system reboot using systemd on Ubuntu Linux 16.04

Modify mediaflux script file from $MFLUX_HOME/bin/unix/mediaflux and install it to /etc/init.d/mediaflux.

create systemd unit file at /lib/systemd/system/mediaflux.service

[Unit]
Description=Mediaflux Server
After=remote-fs.target
   
[Service]
Type=forking
ExecStart=/etc/init.d/mediaflux start
ExecStop=/etc/init.d/mediaflux force-stop

[Install]
WantedBy=multi-user.target

Enable the systemd unit (so that it is called on reboot)
```
sudo systemctl enable mediaflux.service
```
Start the service manually(without reboot)
```
sudo systemctl start mediaflux.service
```

Ubuntu Linux 16.04 systemd unit file for Mediaflux server

[Unit]
Description=Mediaflux Server
After=remote-fs.target
   
[Service]
Type=forking
ExecStart=/etc/init.d/mediaflux start
ExecStop=/etc/init.d/mediaflux force-stop

[Install]
# IMPORTANT: The following line is to insert the service to the dependency tree. Otherwise, it will not be called on system reboot.
WantedBy=multi-user.target

Mac OS X: extra output message when exiting Terminal

After upgrade to Mac OS X El Captain, when exiting from Terminal, I see the following message:

According to this, it is not to be worried.

rsync: specify SSH identity file (private key)

rsync -Pavx -e 'ssh -i /path/to/id_rsa' /local/file user@server:/remote/dir

Bash: check if number is odd or even

n=12
if [[ $((n % 2)) -eq 0 ]]; then
   echo "even"
else
   echo "odd"
fi

Bash: loop through file names with spaces

#!/bin/bash

IFS_BAK=$IFS
IFS=$(echo -en "\n\b")
for f in $(ls)
do
  echo "$f"
done
IFS=$IFS_BAK

bash: remove leading zeros

s="00012"
n=$(expr $s + 0)
echo $n

find without recursion

find . -maxdepth 1

find . -maxdepth 1 -type d

sed: delete all characters before matching word

echo "    1234567890abcdef" | sed 's/^*.abc/abc/'

sed: replace formatted numbers

Example remove date string:

s="1234 2007-12-21 11:22:30 1.txt"
s=$(echo $s | sed 's/[0-9]\{4\}-[0-9]\{2\}-[0-9]\{2\}\s*//')
echo $s
# 1234 1.txt

Shell script: execute a string as command

eval is what we need:

string="echo \"Shell scripting is cool.\""
eval $string

Shell script: set delimiter and read line from file

while IFS=$'\t' read col1 col2; do
    echo "column 1: ${col1}"
done < /path/to/input.txt

The above code read from tab delimited text file.

Shell script: loop through lines from file or command output

You can pipe command output to a while loop

echo /path/to/1.txt | while IFS=$'\t' read a b; do
   echo "${b}, ${a}"
done

Or loop through a text file:

while IFS=$'\t' read a b; do
   echo "${b}, ${a}"
done < /path/to/1.txt

awk: re-order columns using printf

echo 1.txt | awk 'BEGIN{FS="\t"} {printf "%s\t%s\n", $2, $1}'

Shell script: get file size

stat -c %s /path/to/file

#!/bin/bash

path=/path/to/file
size=$(stat -c %s ${path})
if [[ $size -eq 0 ]]; then
    echo "${path} is a zero-size file."
fi

Note: If path directs to a directory, it will not fail nor return 0. It returns the block size associated with the directory. See this for more details.

Shell script: remove leading and trailing character

s="\"Shell scripting is interesting.\""
echo $s

# ${s%\"} will remove the suffix " (escaped with a backslash to prevent shell interpretation)
s=${s%\"}

# ${s#\"} will remove the prefix " (escaped with a backslash to prevent shell interpretation)
s=${s#\"}
echo $s

Sed: multiple substitutes in one sed command

Delimit commands with semicolon:

echo "John like apples." | sed 's/apple/pear/;s/John/David/'

Another example, remove leading and trailing quotes:

echo "'Sed is cool.'" | sed 's/^'//;s/'$//'

A shell script to check files in SWIFT object storage

sed: delete matching lines

sed -i.bak '/pattern/d' input.txt

Shell scripting: remove .DS_Store and ._* files recursively on Linux or Mac

find . -name ".DS_Store" -print0 | xargs -0 rm -rf
find . -name "._*" -print0 | xargs -0 rm -rf

find . -name ".DS_Store" -delete
find . -name "._*" -delete

find . \( -name '.DS_Store' -or -name '._*' \) -delete

Shell scripting: Removing repeating empty lines

cat -s 1.txt > 1.txt; mv 1.txt.tmp 1.txt

Shell scripting: enclose all lines with quotes

Using awk:

awk '{print "\""$0"\""}' input.txt

or if ignore empty lines:

awk 'NF {print "\""$0"\""}' input.txt

Or using sed:

sed -i.bak 's/^/"/; s/$/"/' input.txt

or if ignore empty lines:

sed -i.bak 's/^..*$/"&"/' input.txt

Shell Scripting: delete blank lines from a text file using sed

Delete empty lines using sed:

sed -i.bak '/^\s*$/d' 1.txt

Java: Stream Handler for Logger

        Logger logger = Logger.getLogger("daris-download");
        logger.setLevel(Level.ALL);
        logger.setUseParentHandlers(false);
        /*
         * file handler
         */
        FileHandler fileHandler = new FileHandler(
                "%h/.daris/daris-download.%g.log", 5000000, 2);
        fileHandler.setLevel(Level.ALL);
        fileHandler.setFormatter(new Formatter() {

            @Override
            public String format(LogRecord record) {
                StringBuilder sb = new StringBuilder();
                sb.append(new Date(record.getMillis())).append(" ");
                sb.append("[thread: ").append(record.getThreadID())
                        .append("] ");
                sb.append(record.getLevel().getName()).append(" ");
                sb.append(record.getMessage());
                sb.append("\n");
                return sb.toString();
            }
        });
        logger.addHandler(fileHandler);
        /*
         * console handler
         */
        StreamHandler consoleHandler = new StreamHandler(System.out,
                new Formatter() {
                    @Override
                    public String format(LogRecord record) {
                        return record.getMessage() + "\n";
                    }
                }) {
            @Override
            public synchronized void publish(LogRecord record) {
                super.publish(record);
                super.flush();
            }
        };
        consoleHandler.setLevel(Level.INFO);
        logger.addHandler(consoleHandler);

几个中文影视直播APK

Shell script: Java arguments contains spaces

java -jar myapp.jar ${1+"$@"}

Java: low level logging messages not showing

FINE level logging message is not shown even if the handler.setLevel(Level.FINE).

Reason

java.util.logging has a root logger that defaults to Level.INFO, and a ConsoleHandler attached to it that also defaults to Level.INFO. Level.FINE is lower than Level.INFO, so fine messages are not displayed by default.

Solution

    Logger logger = Logger.getLogger("my-logger");
    logger.setLevel(Level.ALL);
    logger.setUseParentHandlers(false);
    /*
     * file handler
     */
    FileHandler fileHandler = new FileHandler(
                "%h/.my-app.%g.log", 5000000, 2);
    fileHandler.setLevel(Level.ALL);
    logger.addHandler(fileHandler);
    /*
     * console handler
     */
    ConsoleHandler consoleHandler = new ConsoleHandler();
    consoleHandler.setLevel(Level.INFO);
    logger.addHandler(consoleHandler);

Java: Consume InputStream by Null OutputStream

OutputStream nullOutputStream = new OutputStream() { 
    @Override
    public void write(int b) {
    }
};

Java: Remove illegal character 0x0 from string

Unicode 0x0 is illegal in XML.

str.replaceAll("[\\000]+", "")

海外看中超亚冠直播的几个网站

2017年3月更新

乐视由于欠费，失去2017亚冠中超直播权。2017亚冠中超网上直播有PPTV。央视也开始直播亚冠中超。

飞流直播	目前最好的看2017亚冠，中超直播站。【推荐】
http://goatd.net/	速度比较快，画质一般，无中文解说。中超亚冠都有直播。【不再推荐，因为此网站被google提示有安全问题，其实是弹窗广告安装流氓软件】
央视体育频道（CCTV 5, CCTV 5+）［可在电脑上安装Bluestacks模拟器和电视家观看］	中文解说，画质较好，经常有停滞和音画不同步。央视2017直播亚冠中超。

Java synchronized block in static method

class Test {


    public static Test() {
        synchronized(Test.class) {
            ... ...
        }
    }

}

JavaFX WebView shows blank page when the web site ssl certificate is not trusted ( or self-signed)

JavaFX WebView shows blank page when the web site ssl certificate is not trusted (or self-signed). There is not errors/exceptions that you can see unless you set up a listener before you load the web site in WebView: The following code will show the error:

    WebView web = new WebView();
    web.getEngine().load("https://www.your-org.org");
    web.getEngine().getLoadWorker().stateProperty()
            .addListener((ov, oldState, newState) -> {
                System.err.println(web.getEngine().getLoadWorker()
                         .exceptionProperty());
            });

The error is like below:

java.lang.Throwable: SSL handshake failed

To resolve the error, if you trust the web site, you can ignore the error by adding following code before you start the WebView:

// Create a trust manager that does not validate certificate chains
TrustManager[] trustAllCerts = new TrustManager[] { 
    new X509TrustManager() {     
        public java.security.cert.X509Certificate[] getAcceptedIssuers() { 
            return null;
        } 
        public void checkClientTrusted( 
            java.security.cert.X509Certificate[] certs, String authType) {
            } 
        public void checkServerTrusted( 
            java.security.cert.X509Certificate[] certs, String authType) {
        }
    } 
}; 

// Install the all-trusting trust manager
try {
    SSLContext sc = SSLContext.getInstance("SSL"); 
    sc.init(null, trustAllCerts, new java.security.SecureRandom()); 
    HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
} catch (GeneralSecurityException e) {
}

WebView web = new WebView();
web.getEngine().load("https://www.your-org.org");

NOTE: After executing the above code, your application will trust all https web sites. To have a more secure solution, you may maintain a local key store to add the trusted certificates, see this for more detail.

openssl command to check web site ssl certificate

openssl s_client -showcerts -connect www.google.com:443

Coolpad 8297W remove News Stream

Root the phone
Install System App Remover from Google Play Store.
Uninstall News Stream in System Application Remover

Telstra ZTE MF60 WIFI modem: change APN settings

You have to insert a Telstra SIM card (otherwise you will not be able to set the new profile as default.)
Power on the modem, can connect to the WIFI from your computer.
Open http://192.168.0.1 in your browser.(Default username: admin password: admin)
3G Settings -> APN Settings
Click 'Add' button to add a new profile, edit the APN, then click 'Set default' button.

:filetype indent on
:set filetype=html
:set smartindent

Then re-format the file using the following commands:

1G      # go to the beginning of file
gg=G    # reformat the file from the beginning

CSS: image auto resize and centered inside a div

<div style="width:600px; height:400px;">
<div style="vertical-align:middle; text-align:center; width:100%; height:100%;">
    <img style="max-width:100%; max-height:100%; width:auto; height:100%;" src="http://your-domain.org/your-img.png"/>
</div>
</div>

CSS: fit textarea to its parent div

textarea {
    height: 100%;
    width: 100%;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

Example HTML code:

<div style="width:600px; height:400px;">
<textarea style="height:100%; width:100%; box-sizing: border-box;" readonly>
This is a textarea.
</textarea>
</div>

Run the Example:

This is a textarea.

Enable Mac OS X Integration library (com.apple.eawt.*) in Eclipse Java 8 Project

Right click the project, select 'Build Path' then 'Configure Build Path...'
Activate 'Libraries' tab, then open 'JRE System Library', then select Access Rules...

Click 'Edit...' button, then click 'Add' button and type the rules:

Resolution: 'Accessible'
Rule Pattern: 'com/apple/eawt/**'

Install XNAT on Ubuntu 14.04

Install and configure postgresql

Install postgresql:
```
sudo apt-get install postgresql
```
Edit /etc/postgresql/9.3/postgresql.conf, and set:
```
standard_conforming_strings=off
```
Restart postgresql:
```
sudo /etc/init.d/postgresql restart
```

Install Java 7

Run the following commands to install Java 7 SDK:

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer
sudo echo "export JAVA_HOME=/usr/lib/jvm/java-7-oracle" >> /etc/bash.bashrc

Run the following command to set Java 7 as default(java):
```
sudo apt-get install oracle-java7-set-default
```

Install Tomcat 7:

export JAVA_HOME=/usr/lib/jvm/java-7-oracle; sudo apt-get install tomcat7

Install Maven:

cd /opt/; sudo wget http://apache.mirror.serversaustralia.com.au/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.tar.gz
sudo tar zxvf apache-maven-3.3.9-bin.tar.gz
sudo ln -s /opt/apache-maven-3.3.9/ /opt/maven

Download and extract XNAT source:

cd /opt
sudo wget ftp://ftp.nrg.wustl.edu/pub/xnat/xnat-1.6.5.tar.gz
sudo tar zxvf xnat-1.6.5.tar.gz

Create XNAT unix user:

sudo useradd -u 6667 -d /opt/xnat -s /bin/bash xnat
sudo usermod -a -G tomcat7 xnat
sudo chown -R xnat:xnat /opt/xnat

Prepare XNAT directories:

sudo mkdir /data/xnat/archive
sudo mkdir /data/xnat/prearchive
sudo mkdir /data/xnat/ftp
sudo mkdir /data/xnat/cache
sudo mkdir /data/xnat/build

Note: /data/xnat should be the mount point for large storage for XNAT.

Set up environment variables for xnat user, by editting .bashrc file:

sudo su xnat
vi ~/.bashrc

add the following:

# JAVA
export JAVA_HOME=/usr/lib/jvm/java-8-oracle
export PATH=$JAVA_HOME/bin:$PATH


# Maven
export MAVEN_HOME=/opt/maven
export PATH=$PATH:$MAVEN_HOME/bin

# Tomcat
export TOMCAT_HOME=/opt/tomcat
export PATH=$PATH:$TOMCAT_HOME/bin

# XNAT
export XNAT_HOME=/opt/xnat
export PATH=$PATH:$XNAT_HOME/bin

Create XNAT database user xnat01:
```
sudo su postgres
createuser -U postgres -S -D -R -P xnat01
```
Note: set and remember the password for db user xnat01, you will need it in the XNAT build.properties file.

Create XNAT database:

sudo su postgres
createdb -U postgres -O xnat01 xnat

Edit build.properties:

su xnat
cd /opt/xnat
cp build.properties.sample build.properties
vi build.properties

and the content should be like below:

maven.appserver.home = /var/lib/tomcat7

xnat.site.title=XNAT
xdat.project.name=xnat
xdat.project.db.name=xnat
xdat.project.db.driver=org.postgresql.Driver
xdat.project.db.connection.string=jdbc:postgresql://localhost/xnat
xdat.project.db.user=xnat01
xdat.project.db.password=XXXXXXX
xdat.archive.location=/data/xnat/archive
xdat.prearchive.location=/data/xnat/prearchive
xdat.cache.location=/data/xnat/cache
xdat.ftp.location=/data/xnat/ftp
xdat.build.location=/data/xnat/build
xdat.mail.server=mail.yourdomain.org
xdat.mail.port=25
xdat.mail.protocol=smtp
xdat.mail.username=
xdat.mail.password=
xdat.mail.admin=admin@xnat.yourdomain.org
xdat.url=http://192.168.100.12:8080/xnat
xdat.require_login=true
xdat.enable_new_registrations=false
xdat.security.channel=any
xdat.enable_csrf_token=true

Note: xdat.url need to be set to the public ip or address instead of localhost if you want the XNAT server to be accessed from other computers.

Edit project.properties file. and replace the 'maven.repo.remote' line with

maven.repo.remote=https://nrgxnat.artifactoryonline.com/nrgxnat/xnat-maven1

Run setup.sh script
```
sudo su xnat
cd /opt/xnat
bin/setup.sh
```
Create Database tables & views:
```
cd /opt/xnat
psql xnat01 -h localhost -d xnat -f deployments/xnat/sql/xnat.sql
```
Note: you need supply the password for db user xnat01.

Store initial security settings:

sudo su xnat; cd /opt/xnat/deployments/xnat
StoreXML -project xnat -l security/security.xml -allowDataDeletion true

Store Example Custom Variable Sets:

sudo su xnat; cd /opt/xnat/deployments/xnat
StoreXML -dir ./work/field_groups -u admin -p admin -allowDataDeletion true

Deploy the web app

sudo su xnat; cd /opt/xnat
bin/update.sh -Ddeploy=true

Set the ownership of web app directory:

sudo su chown -R tomcat7:tomcat7 /var/lib/tomcat7/webapps/xnat

Coolpad F1 8297W: How to install custom recovery?

You need to root your 8297W mobile phone first.
After rooting, install Mobile Uncle(YDSS) MTK tools from Google play store.
You can install CWM or TWRP.

Download CWM Recovery
Download TWRP Recovery

Extract the downloaded CWM or TWRP package, copy recovery.img file to your 8297W SD card's root directory.
Open MobileUncle Tools (in your mobile) to install recovery update

Coolpad F1 8297W: How to enter fastboot mode?

How to enter Fastboot Mode

Turn off the mobile.
Hold Volume Up, Volume Down and Power buttons until system starts.

Coolpad F1 8297W: How to enter recovery mode?

How to enter Recovery Mode

Turn off the mobile.
Hold Volume Up and Power buttons until phone starts.
It should display a little Android Icon with message "No command."
Press Power button again to enter Recovery Mode.
Use Volume Down button to move the cursor and use Volume Up button to enter the selected item.

Coolpad F1 8297W: How to root?

Method 1: Use Baidu Root tool. You can try either PC version or Android version:

Download Baidu Root for PC, install & run it on your pc, you will need to connect your mobile to the pc to root.
Download Baidu Root for Mobile (APK), install & run it on your mobile.

Method 2: Manual root

Download Official_root.zip and copy it to the phone's SD card.
Turn off the phone.
Hold Volume Up and Power buttons to start the phone and enter Recovery Mode, until see the Android icon with message "No command". Press Power button again to see the menu.
Use Volume Down button to move cursor to "Apply software update from SD card", press Volume Up to select it.
Select Official_root.zip then press Volume Up to install it
After installation, restart the phone. You should see a app named SU.

Coolpad F1 8297W: ROM Update Guide

First, you need to root your coolpad F1 8297W mobile phone.
Install Custom Recovery. You can install eitherCWM or TWRP.
Copy the ROM zip file to your 8297W mobile's SD card.
Turn off the phone.
Hold Volume Up and Power buttons to get into recovery mode.
In the main menu of the recovery mode, select "wipe data/factory reset" to clear all user data.
In the main menu of the recovery mode, select "wipe cache partition" to clear cache.
In the main menu of the recovery mode, select "install zip from sdcard" then select the ROM zip file from SD card to install.
Complete flashing. First reboot may take a while.

rsync script to mirror files/directories

#!/bin/bash

rsync -avx --progress -e ssh "$@"

Python: calculate crc32 checksum for a file

import zlib
import sys

BUFFER_SIZE=8192

def get_crc32(path):
    with open(path, 'rb') as f:
        crc = 0
        while True:
            data = f.read(BUFFER_SIZE)
            if not data:
                break
            crc = zlib.crc32(data, crc)
    return crc

def main():
    for f in sys.argv[1:]:
        crc32 = get_crc32(f)
        crc32hex = hex(crc32)[2:]
        print(f'{f}: {crc32hex}')

if __name__ == '__main__':
    main()

Usage

% python3 crc32.py my-file.dat
./my-file.dat: 780acc19

Flash Chess Game

Play full screen

Generate a self-signed multiple domain (UCC) SSL certificate

Option 1: using openssl

Find openssl.cnf
```
sudo find / | grep openssl.cnf
```

On Mac OS X, it is /System/Library/OpenSSL/openssl.cnf
On Ubuntu Linux, it is /usr/lib/ssl/openssl.cnf

Make a copy of openssl.cnf to /tmp/openssl.cnf

cp /usr/lib/ssl/openssl.cnf /tmp/openssl.cnf

Edit /tmp/openssl.cnf and append following line in [v3_ca] section:
```
[v3_ca]
... ... ...
subjectAltName = @alternate_names
```
then append [alternate_names] section:
```
[alternate_names]
DNS.1 = mediaflux.localhost
DNS.2 = daris.localhost
```
Also, modify
```
copy_extensions = copy
```
It ensures the SANs are copied into the certificate.

Generate private key:

openssl genrsa -out private.key 3072 -nodes openssl req -new -x509 -key private.key -sha256 -config /tmp/openssl.cnf -out public.crt -days 730 -subj "/C=AU/ST=Victoria/L=Melbourne/O=W/OU=WL/CN=localhost"

Option 2: using Java keytool

keytool -selfcert -genkeypair -keystore /tmp/certs -alias mflux -storepass password -keyalg "RSA" -validity 3650 -dname "cn=localhost, ou=WL, o=W, l=Melbourne, st=Victoria, c=AU" -ext san=dns:daris.localhost,dns:mediaflux.localhost

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Key points

Install CIFS/Samba client

Manual mount

Auto mount

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Reason

Solution

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2017年3月更新

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How to enter Fastboot Mode

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How to enter Recovery Mode

see also

Method 1: Use Baidu Root tool. You can try either PC version or Android version:

Method 2: Manual root

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Usage

see also