Commands using export

(1) don't run twice, or the same folder will occur in $PATH.

(2) otherwise you need to start a new terminal

a pretty simple script when running java programs from command line

This will temporarily add the current directory to your $PATH. Allowing you to execute from that directory for the duration of the session.

Useful in root's .profile - will auto-logout after TMOUT seconds of inactivity.

Close after `seconds` inactive.

export TMOUT=seconds

(unefunge)

Adds the time in 12hr AM/PM format to the beginning of a prompt. Change \@ to \t for 24-hour time or \T for 12hr without AM/PM.

To keep the time the next time you open a terminal, edit ~/.bashrc and stick the command at the bottom.

pushd and popd are your friends, but sometimes they're just incompatible with the way one works...

Two shell functions:

bm bookmarkname - "bookmarks" the current directory, just 'cd $BMbookmarkname' to return to it.

forget bookmarkname - unsets the 'bookmarkname' variable. It isn't mandatory, they cease to exist when the session ends.

If the return code from the last command was greater than zero, colour part of your prompt red. The commands give a prompt like this:

[user current_directory]$

After an error, the "[user" part is automatically coloured red.

Tested using bash on xterm and terminal. Place in your .bashrc or .bash_profile.

This will cause bash to fix a garbled terminal before the prompt is printed. For example, if you cat a file with nonprintable character sequences, the terminal sometimes ends up in a mode where it only prints line drawing characters. This sequence will return the terminal to the standard character set after every command.

I used to do a lot of path manipulation to set up my development environment (PATH, LD_LIBRARY_PATH, etc), and one part of my environment wasn't always aware of what the rest of the environment needed in the path. Thus resetting the entire PATH variable wasn't an option; modifying it made sense.

The original version of the functions used sed, which turned out to be really slow when called many times from my bashrc, and it could take up to 10 seconds to login. Switching to parameter substitution sped things up significantly.

The commands here don't clean up the path when they are done (so e.g. the path gets cluttered with colons). But the code is easy to read for a one-liner.

The full function looks like this:

I tried using regexes to make this into a cleaner one-liner, but remove_path ended up being cryptic and not working as well:

you should have the "most" package installed. I like it because it is colorful and easier to read. alternatively you can use "less" instead of "most".

you can also add this to your ~/.bashrc to make it permanent.

Prepends paths containing man directories to your MANPATH variable for the given top level directory. If you build or install software with non-standard documentation locations, you can just add them to your MANPATH with this little function. -xdev prevents crossing filesystem boundaries when searching for man dirs.

This command is great for dumping your history so that when you're working on a system that is under a shared account, you can keep others from reviewing your history file. I use this when I'm just visiting a system to diagnose a problem, or to make a quick fix.

#ps aliases

PSO='user,pid,ppid,%cpu,%mem,time,start,state,command'

PSOA='user,pid,time,state,command'

PSOL='user,pid,ppid,%cpu,%mem,nice,pri,etime,time,tt,state,ucomm'

export PSO PSOA PSOL

function _ps { /bin/ps $@ ; }

alias ps='_ps ax -o $PSO'

alias psa='_ps ax -o $PSOA'

alias psl='_ps ax -o $PSOL'

alias psm='_ps -U $USER -o $PSOA'

In some case, you need to use remote gui on servers or simple machines and it's boring to see "cannot open display on ..." if you forgot to export your display. Juste add this line in .bashrc on remote machine. Dont forget to allow remote client on your local X server :

When browsing java source code (for example) it's really annoying having to type the first letter of the package when there is only one package in the subdir.

man bash for more info about FIGNORE

This one eliminates the additional backslash at the end (which is not necessary)

This will kill a specific process you don't know the PID of, when pidof and pgrep are not available, for example on OS X. var1 is created so that the whitespace can be trimmed before passing off to kill.

This function is used to sort selected lines of a text file to the end of that file. Especially useful in cases where human intervention is necessary to sort out parts of a file. Let's say that you have a text file which contains the words

rough

slimy

red

fluff

dough

For whatever reason, you want to sort all words rhyming with 'tough' to the bottom of the file, and all words denoting colors to the top, while keeping the order of the rest of the file intact.

'$EDITOR' will open, showing all of the lines in the given file, numbered with '0' padding. Adding a '~' to the beginning of the line will cause the line to sort to the end of the file, adding '!' will cause it to sort to the beginning.

Like the given command, but combines _DISPLAY=":0.0"_ with _export DISPLAY_ to get _export DISPLAY=":0.0"_ and only imports if DISPLAY is set successfully.