Replaces every ocurrence of 'old' for 'new' in all files specified. After the 'i' char you can put a '~' or whatever to create a backup file for each replaced with the name equal to the original plus character.

just for fun

Useful if you have to tunnel ssh through a local port and it complains of the host key being different. Much easier than manually editing the file.

Only excludes .svn from filenames. Show Sample Output

Open a terminal (urxvt in this case) to connect to a screen session (named "main") and create the screen session if necessary.

Ping machine once, waiting 1 second for response until failing. Upon fail, ssh globally, otherwise ssh locally.

Returns the pathnames of the files which would be executed in the current environment had its arguments been given as a command.

Variant of find grep that ignores files with .svn in the name. Useful for searching through a local repository of source code.

Replace and accordingly.

bash/ksh subshell redirection (as file descriptors) used as input to diff

Good for one off jobs that you want to run at a quiet time. The default threshold is a load average of 0.8 but this can be set using atrun. Show Sample Output

Useful in scripts when the file is passed in as an argument. Eg. filepath=$(realpath $1) Show Sample Output

Useful for checking if there are differences between local and remote files.

This decompresses the file and sends the output to STDOUT so it can be grepped. A good one to put in loops for searching directories of gzipped files, such as man pages. Show Sample Output

Useful for getting to know the available keyboard shortcuts. Show Sample Output