Enhance Bash Completion feature

February 10, 2007

as known pressing tabs in the Command Line Interface will complete commands or filenames for you, it's a very nice feature in bash, i don't remember most of the commands without this feature, but does this feature need to enhance? when you write cd [tab] then bash will list all files and directories in the directory you are working in, but you just need the directories to be listed.

Imagine typing ssh [Tab] and being able to complete on hosts from your ~/.ssh/known_hosts files. Or typing man 3 str [Tab] and getting a list of all string handling functions in the UNIX manual.

you can do many things like that with bash built in commands like complete for example:
complete -d pushd -C cd
now when you use cd [tab] then the directories should be listed....
there is a nice tool named bash-completion that combines a lot of nice completion features, in slackware you can find it in the extra folder. i dont know about the other distributions but you can find it here, after you install it, you have to source it with ./etc/bash_completion command or you can put it into your ~/.bashrc file by writing some something like this in it

# enable bash completion in interactive shells
if [ -f /etc/bash_completion ]; then
. /etc/bash_completion
fi

Have Fun!

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Remote computing with a Linux application server farm

February 9, 2007

i found a nice case study talking about Network booting, VNC, and SSL cooperate to yield big benefits...

You've heard of Web 2.0, right? Well, here's "utility computing 2.0," a combination of network booting, SSL, VNC, and other familiar concepts and technologies -- all on Linux® -- that can yield dramatic returns on investment. See how the University of California set up a server farm environment to provide secure remote desktop application services for students.

continue reading at IBM developerWorks Type rest of the post here

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WaWwwww Finaly

January 22, 2007

YES, i did it, waw what a nice feeling... i finished the damn Univ. OOOOOOOOOhhhhh yes iam so happy, but the counter is just started... any way its a nice feeling to reach the end of this mession... Tick Tock 🙂

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The HELL of the university

January 2, 2007

5.5 years in the damn university, as i said before and like what i say just now, I AM A DAMN DUMP PERSON, how is every body graduated?? i don't know how to do it!!, summer semester was the last one in the university but i failed, now its a second last semester AND I DON'T WANT TO FAIL, i really want to finish this damn story, i want to close this paper, ok on this day 2/1/2007 11:52pm i promise my self not to enter the internet, or touch the computer until 17/1/2007 🙁 i really want to PASS... DAMN PUBLISH

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في رثاء سيد الشرفاء الرئيس الشهيد(بإذن الله) صدام حسين

January 1, 2007

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Without Title

January 1, 2007

ya i am stupid, ya i am that dump person, ya i am not that person who know every thing, i still learn... from 6 month ago i started discovering Arab IT sites, something awful specially the forums... every body want to say "i am the one, i know every thing, no body can..." WHY??? one of this examples was " why you cant write in the wiki? " so Why? the answer should be "how the others will know that this was wrote by me!!" huh... another thing ya salam 3allah el 3onsoryah MmmMm... before i 4get, there is another thing, they are Nominated and Positions LOVER... you know the tail of the story... one site was good its arabeyes (at least in my view), and where is the other sites? huh, we cant respect the others, we cant work together... it was a bad trial... i will back to my corner... not more than a visitor... lets we back to the reality... nifty night...

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Lives in our Heart for ever

December 30, 2006

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bash loging, startup scripts and shell initialization files

December 19, 2006

bash loging, startup scripts and shell initialization files.. ok, i will talk about bash, When a user logs in, environment variables are set from various places. startup scripts in order is like this:

1. /etc/passwd
2. /etc/shadow
3. /etc/group
4. /etc/profile will run.
5. then all the files (that end with sh) in the /etc/profile.d directory
6. then bash will look for ~/.bash_profile, ~/.bash_login, and ~/.profile, in that order, and reads and executes commands from the first one that exists and is readable. (i.e if ~/.bash_profile is not exists then bash will look for ~/.bash_login then ~/.profile and sources that instead). may be ~/.bash_profile source ~/.bash_login and ~/.bashrc in it.

• ~/.bashrc might point to /etc/bashrc

• at logout ~/.bash_logout may run

• bash command history are kept in ~/.bash_history

some of this scripts may not exists in your system (~/.bash_profile, ~/.bash_login, ~/.profile, ~/.bashrc, /etc/bashrc and and ~/.bash_logout), lets we explain them: 1. /etc/passwd /etc/passwd file contains basic user attributes. This is an ASCII file that contains an entry for each user. Each entry defines the basic attributes applied to a user. An entry in the /etc/passwd file has the following form (one entry per line): Name:Password:UserID:PrincipleGroup:Gecos:HomeDirectory:Shell For security reasons, most Linux Distributions no longer store password in this file (store it in /etc/shadow). A corrupt /etc/passwd file can easily render a Linux box unusable. for more info about /etc/passwd see: manpages: man passwd 2. /etc/shadow shadow contains the encrypted password information for user's accounts and optional the password aging information (other information such as account or password expiration values, etc). for more info: manpages: man shadow http://db.assam-glug.org/documentations/Linux-admin-made-easy/shadow-file-formats.html 3. /etc/group /etc/group is an ASCII file which defines the groups to which users belong. There is one entry per line, and each line has the format: group_name:passwd:GID:user1,user2,user3....userN as you see, you have to sperate each user with comma. for more info see: manpages: man group 4. /etc/profile /etc/profile file contains system wide environment stuff and startup programs, all settings that you want to apply to all your users environments should be in this file. 5. /etc/profile.d/*.sh /etc/profile.d is a good place to put application specific settings and their environment variables. 6. ~/.bash_profile, ~/.bash_login, and ~/.profile they can be used like /etc/profile file but for a specific user... they are user-specific bash environmental default settings, contains extra configuration options or change default settings. bash will look for ~/.bash_profile, ~/.bash_login, and ~/.profile, in that order, and reads and executes commands from the first one that exists and is readable. ~/.profile is good when use another shell (like csh) that will not understand bash command and will look for this file. * ~/.bashrc this file used for user-specific aliases, export and user functions. ~/.bashrc might point to /etc/bashrc to run global things. finaly may be you would like to know that when you create a new user, then the home directory for that user will initialised with files from the /etc/skel directory (i.e /etc/skel directory contains subdirectories and files used to populate a new user's home directory). The system administrator can create files in /etc/skel/ directory that will provide a default environment for users. i dont know a good site talking about that, but take a look at this one: http://www.faqs.org/docs/linux_admin/x2331.html to understand them better (/etc/profile, ~/.bash_profile, ~/.bash_login, ~/.profile, ~/.bashrc, /etc/bashrc and and ~/.bash_logout) this sites may give help: http://www.faqs.org/docs/abs/HTML/files.html http://www.faqs.org/docs/securing/chap6sec64.html http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_03_01.html http://www.linux-migration.org/ch02s03.html http://www.gnu.org/software/bash/manual/bash.html http://www.comptechdoc.org/os/linux/usersguide/linux_ugenvironment.html http://www.linuxfromscratch.org/blfs/view/6.1/postlfs/profile.html

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Basic tips for Linux programming

December 15, 2006

If you’re new to Linux programming, then you might be interested in considering these aspects before you start your wonderful journey. Especially if you’ve programmed in Windows, you might want to change some of your ideas, so that you minimize the “culture” shock you experience when you encounter completely different ideas and ways of thinking.

Continue reading at Hari’s Corner

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kill [process id] can kill a process, eyes can kill too

December 12, 2006

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