Tip #52   Improved ls

ls -A -l -h --color=auto

Does ls but with :
-column list format (think dos)
-human readable sizes (megabytes, kb)
-color if enabled

Save to your default settings ! Read more »

Tip #54   Share current tree over the web

Read more »

Tip #62   Sum numbers from a file, stdin, etc.

Throw this in your command pipeline:

Read more »

Tip #64   Find occurrences of a string in a large code base without firing

example, look for all the TODO and HACK strings I left in large java project and show a bit of context before and after using the -C switch of grep.

Read more »

Tip #65  

Use CTRL+A to move to the beginning and CTRL+E to move to the end of a the current line Read more »

Tip #67   Loop over files with spaces in the name

Loop over files with spaces in the name:

(Wrong) example:
Read more »

Tip #68   List files on every cd (zsh)

to run 'ls -lh' whenever you change directories in zsh, put this in ~/.zshrc
Read more »

Tip #77   Bash fork bomb

Don't forget the bash fork bomb. DO NOT TRY THIS AT HOME... Posted here so that you don't see this in a forum or a mailing list and use it without knowing:

Read more »

Tip #78   network copy with ssh and tar

You can use ssh in conjunction with tar to pull an entire directory tree from a remote machine into your current directory:

ssh <username@sourcehost> tar cf - -C <sourcedir> . | tar xvf -

For example, let's say you have a "bsmith" account on a host called "apple". You want to copy those files into your "bobsmith" account on a host called "pear". You'd log into your "bobsmith@pear" account and type the following:

ssh bsmith@apple tar cf - -C /home/bsmith . | tar xvf -

This technique is useful when you have insufficient disk space on the source machine to make an intermediate tarball. Read more »

Tip #79  

zero out the hard drive /dev/sdc, with progress bar

pv /dev/zero | dd of=/dev/sdc bs=4096 Read more »