Open or not open, that is the stupid question.

There is a software call "Synergy" that could let mutli hosts share the same keyborad/mouse (virtual-KVM). http://synergy-foss.org It's funny, try it. Wish this helps. regards, Stanley Huang

Sometimes, you want to assign external python path to program, then you could use "PYTHONPATH" environment variables for this purpose. ex. $ PYTHONPATH=/tmp/my_python_path python - <<EOF > import sys > print sys.path > EOF ['', '/tmp/my_python_path', '/usr/lib/python2.7', ...] $ Wish this helps. regards, Stanley Huang

Cpio is a good tool to pack files in one image, and it's fast. You could use find command to find files that you want and also use gzip to compress it. ex. $ find ./ -print | cpio -o -Hnewc | gzip > /tmp/my.cpio.gz Wish this helps. regards, Stanley Huang

How to create an egg file for Python. First of all, you must have setuptools module. $ sudo apt-get -y install python-setuptools Now, you could try to create an empty egg now. $ mkdir /tmp/demo $ cd /tmp/demo $ cat &ht; ./setup.py <<EOF #!/bin/env python #-*- coding:utf-8 -*- from setuptools import setup setup() EOF $ python setup.py bdist_egg ## bdist_egg is the option for creating egg. $ ls -ALb build dist setup.py UNKNOWN.egg-info You could find, we have three more directories after you execute setup.py build -> dist -> final egg file UNKNOW.egg-info -> egg info Now, we could give setuptools more information about egg. cat > ./setup.py <<EOF #!/bin/env python #-*- coding:utf-8 -*- from setuptools import setup, find_packages setup( name = "my_first_egg", version="0.0.1", packages = find_packages(), zip_safe = False, description = "my first egg.", long_descriptio...

1. scan vgs: $ vgscan 2. get vg information: $ vgdisplay --- Volume group --- VG Name vg00 ... VG UUID FUoK9F-9mgs-jO4M-vub1-Y7zs-6wpQ-uM2S11 --- Volume group --- VG Name vg00 ... VG UUID FUoK9F-9mgs-jO4M-vub1-Y7zs-6wpQ-uM2S12 3. export vg $ vgexport 4. rename vg name $ vgrename FUoK9F-9mgs-jO4M-vub1-Y7zs-6wpQ-uM2S12 vg01 5. import vg $ vgimport vg01 6. get vg information: $ vgdisplay --- Volume group --- VG Name vg00 ... VG UUID FUoK9F-9mgs-jO4M-vub1-Y7zs-6wpQ-uM2S11 --- Volume group --- VG Name vg01 ... VG UUID FUoK9F-9mgs-jO4M-vub1-Y7zs-6wpQ-uM2S12 7. get lv information $ lvscan ACTIVE '/dev/vg00/lv00' [13.99 GiB] inherit inactive '/dev/vg01/lv00' [13.99 GiB] inherit 8. active vg01 $ vgchange --ignorelockingfailure --noudevsync --sysinit -ay vg01 >/dev/null 2>&1 && 9. rename lv name(optio...

You could use the following methods to get the last argument that you pass to script. #!/bin/bash getLastArg1() { for last do true done echo $last } getLastArg2() { echo $@ | awk '{print($NF)}' } getLastArg3() { eval echo `echo \\$${#@}` } getLastArg1 $@ getLastArg2 $@ getLastArg3 $@ $ ./test.sh a b c c c c $ Wish this helps. regards, Stanley Huang

Ref: https://python-guide.readthedocs.org/en/latest/writing/tests.html Mock: http://www.voidspace.org.uk/python/mock/getting-started.html# Wish this helps. regards, Stanley Huang

There are tips for Python: 1. Use mock for replace method. ex. myMock=mox.Mox() myMock.StubOutWithMock(myModule, 'replaceMethod') myModule.replaceMethod(input).AndReturn('Hello World!') myMock.ReplayAll() expected = 'Hello World!' self.assertEqual(module.replaceMethod(input), expected) myMock.VerifyAll() #verify if all mocks be executed. myMock.UnsetStubs() #release all mocks 2. Use -m to test one method only. ex. $ python -m unittest myApp.TestClass.testMethod Wish this helps. regards, Stanley Huang

$ sudo pip install coverage $ coverage run myApp.py arg1 arg2... $ coverage report -m $ coverage html $ coverage help (run) ## or coverage run --help Commands of coverage: run – Run a Python program and collect execution data. report – Report coverage results. html – Produce annotated HTML listings with coverage results. xml – Produce an XML report with coverage results. annotate – Annotate source files with coverage results. erase – Erase previously collected coverage data. combine – Combine together a number of data files. debug – Get diagnostic information. Ref: http://nedbatchelder.com/code/coverage/ http://nedbatchelder.com/code/coverage/cmd.html#cmd Wish this helps. regards, Stanley Huang

There are the popular MySQL GUI client tools: . Aqua Data Studio. http://www.aquafold.com/aquadatastudio_downloads.html . CLIENT FOR MYSQL BY ENGINSITE. http://www.enginsite.com/Download.htm . dbForge Studio. http://www.devart.com/dbforge/mysql/studio/ . DBTools Manager. http://www.dbtools.com.br/EN/dbmanagerpro/ . DbVisualizer. http://www.dbvis.com/ . Dreamcoder for MySQL. http://www.sqldeveloper.net/database-tools/mysql/overview.html . HeidiSQL. http://www.heidisql.com/ . Navicat. http://www.navicat.com/en/products/navicat_mysql/mysql_overview.html . MyDB Studio. http://www.mydb-studio.com . phpMyAdmin. http://www.phpmyadmin.net/home_page/ . Sequel Pro. http://www.sequelpro.com/ . SQL Examiner Suite. http://www.sqlaccessories.com/SQL_Examiner_Suite/ . SQL Maestro MySQL Tools Family. http://www.sqlmaestro.com/products/mysql/ . SQLWave. http://www.nerocode.com/ . SQLyog. https://www.webyog.com/ . SQuirreL. http://squirrel-sql.sourceforge.net/ . Toad for MySQL. http://www.quest....

First, you have to download MySQL source and use the following command to build it. $ ./configure --without-server --enable-thread-safe-client --with-client-ldflags=-all-static --prefix=/usr/local/mysql --with-machine-type=powerpc --with-zlib-dir=/usr/local/zlib --without-debug --without-docs --with-big-tables If you don't want to build it, there is a way to get it. (The sample is for Ubuntu only.) $ apt-get install libmysqlclient15-dev Wish this helps. regards, Stanley Huang

Here is a power editor called "Sublime", please follow the link to get more information. http://www.sublimetext.com/ Some useful settings: 1. enable vim. In Perferences -> Settings-Default, empty the value of ignored_packages, e.g. "ignored_packages": [], Default ignore the package Vintage, the vim pakcage. 2. default with command mode. Add one line in Perferences -> Settings-User: "vintage_start_in_command_mode": true, The default mode of vintage would be "command mode" 3. tab for 4 spaces. In Perferences -> Settings-Default, modify the value of tab_size with 4, e.g. "tab_size": 4, And also modify the value of translate_tabs_to_spaces with true, e.g. "translate_tabs_to_spaces": true, 4. auto-trim tailing spaces. Add one line in Perferences -> Settings-User: "trim_trailing_white_space_on_save": true, Wish this helps. regards, Stanley Huang

In my company, I need to test it when I build a new image. Therefore I have to setup my testing environment for integration test. I wrote a script to automatically setup the environment from new install Ubuntu. The steps are: 1. Download and setup tftp server. 2. Download and setup dhcp server with netboot option. 3. Install virtualbox. After that you could create a VM then choose netboot. (the first interface must connect to tap0 to get boot server information) #!/bin/bash ######## utilities ######## _getTasks() { indent="$1" cat $0 | grep '()' | grep -v "^_" | grep "^[^ ]" | cut -d'(' -f1 | sed -e "s/^/$indent/" } _showUsage() { indent=" " cat <<EOF Usage: $0 task Ex. $0 `_getTasks | head -1` tasks: ${indent}[ all ] `_getTasks "$indent"` EOF } _die() { echo "$1" exit ${2:-1} } _checkID() { uid=`id | cut -d'(' -f1 | cut -d'=' -f2` [ $uid -ne ...

There is an paper told us how to setup Ubuntu 12.04 for Juniper VPN. Then I follow the guide and also write a script for installation/setup. The steps as the following: 1. Download ans install ia32-libs to support 32 bit libraries. 2. Download and install x64 JRE, jre-7u21-linux-x64.tar.gz. 3. Create plugin link for firefox/google chromium. 4. Update alternative Java. 5. Download and install i586 JRE, jre-7u21-linux-i586.tar.gz. After that, you could login to your VPN. #!/bin/bash ## url link for 64 bit JRE. jre_x64_source_url=http://javadl.sun.com/webapps/download/AutoDL?BundleId=76853 ## url link for 32 bit JRE jre_i586_source_url=http://javadl.sun.com/webapps/download/AutoDL?BundleId=76851 die() { echo "$1" exit ${2:-1} } checkRootID() { uid=`id | cut -d'(' -f1 | cut -d'=' -f2` [ $uid -ne 0 ] && die "Need root to execute this command, exit!" } checkRootID pek2c() { bDebug && read -p "Press enter key t...

You could use dpkg -P to remove it. e.g. $ dpkg -l virtualbox Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-==================================-======================-======================-========================================================================= ii virtualbox 4.1.18-dfsg-1ubuntu1.1 amd64 x86 virtualization solution - base binaries $ apt-get remove virtualbox ... $ dpkg -l | grep virtual ... rc virtualbox 4.1.18-dfsg-1ubuntu1.1 amd64 x86 virtualization solution - base binaries rc virtualbox-qt 4.1.18-dfsg-1ubuntu1.1 amd64 x86 virtualization solution - Qt based user interface $ pac...

I wrote an easy script for install Ubuntu packages. #!/bin/bash # # This script is for install popular packages # #$: check package, if exists, skip the following prefix #^ #@: apt-get install packages #!: unix command #^@: apt-get install packages, depends on previous #$ #^!: unix command, depends on previous #$ # showUsage() { cat <<EOF Usage: $0 $0 [package name] Ex. $0 $0 rdesktop EOF } isPackageNotInstall() { dpkg -l $1 >/dev/null 2>&1 if [ $? -eq 0 ] then echo "Package '$1' exists, skip it!" return 1 else return 0 fi } getContent() { declare -i begin declare -i end declare -i size begin=$1 end=$2 size=$end-$begin+1 tail -n +$begin $0 | head -$size } getPackageName() { echo $1 | cut -d' ' -f2- | cut -d'#' -f1 } getCommand() { echo "$line" | cut -d' ' -f2- | cut -d'#' -f1 } die() { echo $1 exit 1 } aptGetInstall() { echo -n "Start instal...

There is a tool for Ubuntu could help you to recover disk partition, called "testdisk'. $ sudo apt-get -y install testdisk $ sudo testdisk and choose: Create -> [select disk] -> Intel -> Analyse -> Quick Search -> Write And done~ Wish this helps. regards, Stanley Huang

After I upgrade 12.04, the USB 3.0 port seems not work. Then I google the solution: add "blacklist uas" in the file /etc/modprobe.d/blacklist.conf Wish this helps. regards, Stanley Huang

You could install indicator-virtualbox to launch virtualbox guest OS. https://launchpad.net/indicator-virtualbox/ http://indicator-virtualbox.en.uptodown.com/ubuntu Wish this helps. regards, Stanley Huang

If you want to allow remote display in Ubuntu 12.04, you have do the following steps: 1. remove "-nolisten tcp" from /etc/X11/xinit/xserverrc #[before] $ cat /etc/X11/xinit/xserverrc exec /usr/bin/X -nolisten tcp "$@" #[after] $ cat /etc/X11/xinit/xserverrc exec /usr/bin/X "$@" 2. add "xserver-allow-tcp=true" into /etc/lightdm/lightdm.conf #[before] [SeatDefaults] user-session=ubuntu greeter-session=unity-greeter #[after] [SeatDefaults] user-session=ubuntu greeter-session=unity-greeter xserver-allow-tcp=true 3. restart X 4. allow remote x connection local> xhost + 5. ssh remote server and set DISPLAY local> ssh remote_server remote> export DISPLAY=local_ip:0.0 remote> xclock in 10.04, you have to change above step 2 as the following: 2-10.04: add "DisallowTCP=false" in "security" section. #[before] $ cat /etc/gdm/custom.conf [daemon] TimedLoginEnable=false AutomaticLoginEnable=true TimedLogin=stanley Aut...

Allow VirtualBox guest OS to create symbolic link file in host shared folder: $ VBoxManage setextradata "VM Name" VBoxInternal2/SharedFoldersEnableSymlinksCreate[absolution path for shared folder] 1 $ VBoxManage setextradata "VM Name" VBoxInternal2/SharedFoldersEnableSymlinksCreate/[shared name] 1 Ex. $ VBoxManage setextradata "MyVM" VBoxInternal2/SharedFoldersEnableSymlinksCreate/home/stanley/shared_folder 1 $ VBoxManage setextradata "MyVM" VBoxInternal2/SharedFoldersEnableSymlinksCreate/shared_name 1 And you could verify it by command: VBoxManage getextradata "MyVM" enumerate After setup, you have to shutdown VM (not restart) and boot up it again. Wish this helps. regards, Stanley Huang

Here are some useful tools for Mac OS. $ apt-cache search hfs hfsplus - Tools to access HFS+ formatted volumes hfsutils - Tools for reading and writing Macintosh volumes libhfsp-dev - Library to access HFS+ formatted volumes libhfsp0 - Shared library to access HFS+ formatted volumes squashfs-tools - Tool to create and append to squashfs filesystems squashfs-tools-dbg - Tool to create and append to squashfs filesystems (debug) dmg2img - Tool for converting compress dmg files to hfsplus images hfsprogs - mkfs and fsck for HFS and HFS+ file systems hfsutils-tcltk - Tcl/Tk interfaces for reading and writing Macintosh volumes libhfstdc++6-4.6-dbg-armel-cross - GNU Standard C++ Library v3 (debugging files) libhfstdc++6-armel-cross - GNU Standard C++ Library v3 (hard float ABI) rdiff-backup-fs - Fuse filesystem for accessing rdiff-backup archives $ sudo apt-get -y install hfsplus hfsutils hfsprogs $ sudo apt-get -y install dmg2img Other packages for hfs: $ apt-cache search s...

Python with vim: http://wiki.python.org/moin/Vim Wish this helps. regards, Stanley Huang

Sample for show ansi color in terminal by Python script. #!/bin/env python import os print os.popen('echo "\033[31m\033[43mHello World!\033[0m"').read() print '\033[31m\033[43m' + 'Hello World!' + '\033[0m' Wish this helps. regards, Stanley Huang

If you want to use the concept "connection pool" for ssh, you could try the following sample. #!/bin/bash # # You might need to modify sshd_config with the following attributes: # # MaxStartup 200 # MaxSessions 200 # [ "$1" == "-d" ] && set -vx && shift control_master="$1" && [ "$control_master" != "false" ] && control_master=true username="$2" && [ -z $username ] && username=stanley remote_host="$3" && [ -z $remote_host ] && remote_host=127.0.0.1 cmd1="$4"&& [ -z $cmd1 ] && cmd1=ls control_master_option="" client_cmd="/tmp/a.sh" buildControlMaster() { if $control_master then ssh -N -o "ControlMaster auto" -o "ControlPath ~/.ssh/master-$username@$remote_host" $username@$remote_host & fi } createClientCmd() { mkdir -p /tmp/add rm /tmp/add/* $client_cmd if $c...

You could customize your vim environment by this tools. http://yoursachet.com MEMO: 1. comment "filetype plugin indent on" and "autoindent" to avoid auto indent mess up the indent during past "Python" script code. 2. add, :vmap <C-C>"+y, to enable Ctrl-C to copy text into clipborad. 2-1. $ vim --version | grep xterm_clipboard 2-2. $ sudo apt-get -y install vim-gtk 2-3. $ sudo update-alternatives --config vim 3. add the following settings to set different tab definition with different extension name, autocmd FileType py :setlocal sw=4 ts=4 sts=4 autocmd FileType sh :setlocal sw=2 ts=2 sts=2 Wish this helps. regards, Stanley Huang

Memo it: 1. openWNS: www.openwns.org/Wiki 2. ns-3: www.nsnam.org , ns-3 provides python API to use. Wish this helps. regards, Stanley Huang

Use command: :help :all :help argument-list Wish this helps. regards, Stanley Huang

You could use serval ways to do that. 1. :tabe => tab edit. You use tabn/tabN/tabn[#] to change tab 2. :vs => virtical split. Back to command mode (press ESC key) then you use ctrl-w to change window 3. :sp => horizontal split. Back to command mode (press ESC key) then you use ctrl-w to change window To get more help, use commands: :help :tabe :help :vs :help :sp Wish this helps. regards, Stanley Huang

#!/bin/bash ## Get ansi color code ## Usage: ## getAnsiColorCode (f)orward_ground/(b)ack_ground color_name ## ex. ## getAnsiColorCode f/b black/red/green/yellow/blue/magenta/cyan(purple)/white/default getAnsiColorCode() { sReturnCode="" fb='f' color='default' if [ $# -eq 1 ] then color="$1" elif [ $# -gt 1 ] then fb="$1" color="$2" fi if [ "$fb" == "b" ] then sReturnCode='4' else sReturnCode='3' fi case $color in black) sReturnCode="${sReturnCode}0" ;; red) sReturnCode="${sReturnCode}1" ;; green) sReturnCode="${sReturnCode}2" ;; yellow) sReturnCode="${sReturnCode}3" ;; blue) sReturnCode="${sReturnCode}4" ;; magenta) sReturnCode="${sReturnCode}5" ;; cyan|purple) sReturnCode="${sReturnCode}6" ;; white) ...

A good sample to demo how to setup Juniper VPN in Ubuntu 64 bit environment. http://wireless.siu.edu/install-ubuntu-64.htm Wish this helps. regards, Stanley Huang

Python MRO introduction. http://docs.python-guide.org/en/latest/writing/style/ Wish this helps. regards, Stanley Huang

Python coding style: http://docs.python-guide.org/en/latest/writing/style/ Wish this helps. regards, Stanley Huang

#!/bin/env python class myOpen(object): def __init__(self, filename, readwrite): self.__filename = filename self.__readwrite = readwrite self.__fd = None def __enter__(self): self.__fd = open(self.__filename, self.__readwrite) return self.__fd def __exit__(self, *args): self.__fd.close() with myOpen('/tmp/my.txt', 'r') as f: print f.readlines() with myOpen('/tmp/hello.txt', 'w') as f: f.write('hello world!\n') $ ./test.py ['-rwxr--r-- 1 stanley stanley 846 2012-12-26 13:07 ./c.py\n', '-rwxr--r-- 1 stanley stanley 486 2013-01-08 17:54 ./test.py\n'] $ cat ./my.txt -rwxr--r-- 1 stanley stanley 846 2012-12-26 13:07 ./c.py -rwxr--r-- 1 stanley stanley 486 2013-01-08 17:54 ./test.py $ cat ./hello.txt hello world! Wish this helps. regards, Stanley Huang

There is a good sample for vim settings: http://amix.dk/vim/vimrc.html Wish this helps. regards, Stanley Huang