One Day One GNU/Linux Command (CD)

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Bharathi Subramanian

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May 9, 2008, 1:08:37 AM5/9/08

to GNU/Linux User Group of TCE, GNU/Linux Users Group - Trichy, VEC-FOSS

One Day One GNU/Linux Command
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cd -- Change the Current Directory

Summary:

cd is bash shell's built-in command. It is used to change the present
working Dir to specific Dir.

Examples:

$ cd -- Change the current Dir to $HOME ($HOME is the default).

$ cd ~ -- Same as above.

$ cd ~bharathi -- Goto the Home Dir of bharathi.

$ cd myprj -- Change the current Dir to myprj.

$ cd .. -- Goto the parent Dir.

$ cd - -- Goto the last visited Dir.

TIP:

CDPATH - Easy access to frequently used Dirs. For example, I use
/usr/a/dir1, /usr/b/dir2/ and /usr/c/dir3 folders very frequently.
So I added the above dirs in CDPATH like this

$ export CDPATH=/usr/a/dir1/:/usr/b/dir2/:/usr/c/dir3/

Now there is no need for me to type exact path to cd. Just cd dir1
will cd to /usr/a/dir1. Actually cd will looks into CDPATH before
doing the action.

Note:
1) Before changing to new path, cd will save the old path in the
$OLDPWD evn variable.
2) After changing to new path, cd will save the new path in the $PWD
env variable.