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chmod - change file permissions of a file to be similar of another

Print text string vertically, one character per line.

get the oldest file in a directory
reverse the sorting of ls to get the newest file: $ls -1tr --group-directories-first /path/to/dir/ | tail -n 1 Problems: If there are no files in the directory you will get a directory or nothing.

Show this month's calendar, with today's date highlighted
Explanation: * The date command evaluated to today's date with blank padded on the left if single digit * The grep command search and highlight today's date * The --before-context and --after-context flags displays up to 6 lines before and after the line containing today's date; thus completes the calendar. I have tested this command on Mac OS X Leopard and Xubuntu 8.10

Unzip 25 zip files files at once

Query an NFS host for its list of exports

converting horizontal line to vertical line

print line and execute it in BASH
If script.sh contains only these two lines: $ uname -a $ whoami

Generate MD5 of string and output only the hash checksum in a readable format
Generates the md5 hash, without the trailing " -" and with the output "broken" into pairs of hexs.

Substitute audio track of video file using mencoder
Creates a new video file with video stream copied from input file and a different audio stream


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