Commands using cd

Move efficiently between directories.

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This command adds a couple of extra features to cd, without affecting normal use.

CDPATH use is also unaffected. It introduces and environment variable CDDIR which is used as an alternate home directory.

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Note: I don't want to alter $HOME because then all my dot files will move.

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Examples:

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Change directory to "dir" (using CDPATH if necessary)

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Change directory to "dir" (containing folder of "file.txt")

This allows you to cut'n'paste, or use

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CDDIR is unset

Change directory to $HOME

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CDDIR=/home/flatcap/work

Change directory to /home/flatcap/work

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For convenience, put the command, and the following, in your .bashrc or .bash_profile

export CDDIR="/home/flatcap/work"

alias cdd="CDDIR=$(pwd)"

Make sure to run this command in your git toplevel directory. Modify `-j4` as you like. You can also run any arbitrary command beside `git pull` in parallel on all of your git submodules.

Add DuckDuckGo Search as search provider on gnome-shell/gnome3 .

Needs root permission. To see the results, use alt+f2 and then type r.

extracts path to each md5 checksum file, then, for each path, cd to it, check the md5sum, then cd - to toggle back to the starting directory. greps at the end to remove cd chattering on about the current directory.

Forces the -i flag on the rm command when using a wildcard delete.

Should run with sudo

I submitted a command like this without $0 if $BASH_SOURCE is unset. Therefor, it did only work when using ./script, not using 'sh script'. This version handles both, and will set $mydir in a script to the current working directory. It also works on linux, osx and probably bsd.

finds all epub files in the current directory and all child directories and converts them to .mobi format.

all of the ebook-convert -options are optional; the only parameters you are required to pass are the incoming file and the outgoing file, with the extension.

Has been tested on Ubuntu 10.10

I think this is the cleanest way of getting the current working directory of a script. It also works on osx, Linux, and probably bsd as well..

ksh's version of cd has an optional syntax where you can type "cd old new" and it will replace "old" with "new" in your current directory and take you there. This is very handy when you have a parallel directory structure, like source and object directories. As suggested, you can just type cd ${PWD/old/new} to get this in bash, but this function in your .bashrc will let you type the ksh cd syntax and avoid typing the special characters while preserving other cd functionality.

This creates a bash function `take` that you can call with the name of the directory as the first parameter. Add the function to ~/.bashrc to have it available anytime.

Make it a reusable function and add the -p flag to mkdir to create directories recursively

usage: mydir some/dir/to/create

Create a directory called "dirname" and navigate into it.

Obviously the example given is necessarily simple, but this command not only saves time on the command line (saves you using "cd -" or, worse, having to type a fully qualified path if your command cd's more than once), but is vital in scripts, where I've found the behaviour of "cd -" to be a little broken at times.

This is useful for quickly jumping around branches in a file system, or operating on a parellel file.

This is tested in bash. cd to (substitute in PWD, a for b) where PWD is the bash environmental variable for the "working directory"

This shell function takes a single argument, which is used as the base name of the .wav, .timing and .session files created. To create a screencast:

type and talk ...

then type 'exit' or to exit the screencast.

test.wav will contain the audio from your screencast.

test.session will contain text and control characters needed to paint the screen

test.timing will contain timing information needed to synch individual keystrokes in test.session with the audio.

to play back:

NOTE: because the shell function uses the variable "$!", and bash likes to expand '!' during history expansion, you will need to turn off bash's history before you enter the shell function.

This can be achieved using the command

in fact, I want to know, how to only get the modified files.

Clone directory structure without the files

Here is how to replicate the directory structure in the current directory to a destination directory (given by the variable DESTDIR), without copying the files.

Avoid clobbering files by either overwriting due to name collisions or by assuming the command worked and deleting the target directory.

I think this is less resource consuming than the previous examples

Grabs the cmdline used to execute the process, and the environment that the process is being run under. This is much different than the 'env' command, which only lists the environment for the shell. This is very useful (to me at least) to debug various processes on my server. For example, this lets me see the environment that my apache, mysqld, bind, and other server processes have.

Here's a function I use:

From my .bash_profile at http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html