I often need to know of my directory in the PATH, which one DOES NOT exist. This command answers that question

* This command uses only bash's built-in commands

* The parentheses spawn a new sub shell to prevent the modification of the IFS (input field separator) variable in the current shell

Show apps that use internet connection at the moment.

Can be used to discover what programms create internet traffic. Skip the part after awk to get more details, though it will not work showing only unique processes.

This version will work with other languages such as Spanish and Portuguese, if the word for "ESTABLISHED" still contain the fragment "STAB"(e.g. "ESTABELECIDO")

This corrects duplicate output from the previous command.

Can be used to discover what programms create internet traffic. Skip the part after awk to get more details.

Has anyone an idea why the uniq doesn't work propperly here (see sample output)?

I usually have 5 or more ssh connections to various servers, and putting this command in my .bash_profile file makes my putty window or x terminal window title change to this easily recognizable and descriptive text. Includes the username, group, server hostname, where I am connecting from (for SSH tunneling), which device pts, current server load, and how many processes are running.

You can also use this for your PROMPT_COMMAND variable, which updates the window title to the current values each time you exec a command.

I prefix running this in my .bash_profile with

which makes sure it only does this when connecting via SSH with a TTY.

Here's some rougher examples from http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

And here's a simple function example for setting the title:

Finds executable and existing directories in your path that can be useful if migrating a profile script to another system. This is faster and smaller than any other method due to using only bash builtin commands.

See also:

+ http://www.commandlinefu.com/commands/view/743/list-all-execs-in-path-usefull-for-grepping-the-resulting-list

+ http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

emulates bash4's "echo {03..20}"

Uses bash3 builtin function printf

Uses 'seq' with formatting parameter to generate the necessary padded sequence. Change '%02.0f' to how many digits you need (for 3, use %03.0f, etc) and replace 5 & 15 with your desired min and max.

Bash 4 will let you do {00..19} to get leading zeros, but Bash 3 doesn't have that feature. This technique gets you partway there (the sequences need be such that the last digit ranges from zero to nine - you can't use this for something like Bash 4's {03..27}, for example). When this limitation is not a problem, you can avoid some complicated string manipulation for concatenating leading zeros.

You can add more digits like this: {0..1}{0..9}{0..9} (ranges from 0 to 99 with up to two leading zeros). To pad with additional zeros:

or

This is useful for creating values to sort or for creating filenames with a fixed format. Note that this will also work:

Use of hotcopy for safety/stability of the backups.

This command dumps all SVN repositories inside of folder "repMainPath" (not recursively) to the folder "dumpPath", where one dump file will be created for each SVN repository.

works on all unices.

search argument in PATH

accept grep expressions

without args, list all binaries found in PATH

This command displays a simple menu of file names in the current directory. After the user made a choice, the command invokes the default editor to edit that file.

* Without the break statement, the select command will loop forever

* Setting the PS3 prompt is optional

* If the user types an invalid choice (such as the letter q), then the variable $f will become an empty string.

* For more information, look up the bash's select command

This version uses Pipes, but is easier for the common user to grasp... instead of using sed or some other more complicated method, it uses the tr command

When using reverse-i-search you have to type some part of the command that you want to retrieve. However, if the command is very complex it might be difficult to recall the parts that will uniquely identify this command. Using the above trick it's possible to label your commands and access them easily by pressing ^R and typing the label (should be short and descriptive).

UPDATE:

One might suggest using aliases. But in that case it would be difficult to change some parts of the command (such as options, file/directory names, etc).

This is the way how you can find header and cpp files in the same time.

Every seconds do

Based on the MrMerry one, just add some visuals to differentiate files and directories

Based on the MrMerry one, just add some visuals and sort directory and files

checkfor: have the shell check anything you're waiting for.

'while : ; do' is an infinite loop

'$*' executes the command passed in

'sleep 5' - change for your tastes, sleep for 5 seconds

bash, ksh, likely sh, maybe zsh

Ctrl-c to break the loop

fcd : file change directory

A bash function that takes a fully qualified file path and cd's into the directory where it lives. Useful on the commadline when you have a file name in a variable and you'd like to cd to the directory to RCS check it in or look at other files associated with it.

Will run on any ksh, bash, likely sh, maybe zsh.

Shorter version.

If you need to ssh into a computer on the local network but you're unsure of the ip to use, then ping them and see if you get a response. If you do, print out the address you got it from. Adjust the range to suit your network.

"&&" runs sed if and only if the backup completed and /bin/cp exited cleanly. Works for multiple files; just specify multiple filenames (or glob). Use -v switch for cp to play it safe.