Commands tagged echo (86)

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list block devices
Shows all block devices in a tree with descruptions of what they are.

Force machine to reboot no matter what (even if /sbin/shutdown is hanging)
This will cause your machine to INSTANTLY reboot. No un-mounting of drives or anything. Very handy when something has gone horribly wrong with your server in that co-location facility miles away with no remote hands! Suspect this works with all 2.2, 2.4 and 2.6 Linux kernels compiled with magic-syskey-request support.

urldecoding with one pure BASH builtin
You can use ordinary printf to convert "%23%21%2fbin%2fbash" into "#!/bin/bash" with no external utilities, by using a little known printf feature -- the "%b" specifier converts shell escapes. Replace % with \x and printf will understand the urlencoded string. BASH's printf has an extension to set a variable directly, too. So you get to convert urlencoded strings from garble to plaintext in one step with no externals and no backticks.

tar+pbzip2 a dir

Remove git branches that do not have a remote tracking branch anymore

list block devices
Shows all block devices in a tree with descruptions of what they are.

Search some text from all files inside a directory

Replace the content of an XML element
Replaces "650" with "999" in simple.xml. xml used - http://www.w3schools.com/xml/simple.xml

shell bash iterate number range with for loop
Bash's arithmetic evaluation.

generate 30 x 30 matrix
Replaces hexdump with the more succint xxd, and the sed was unnecessarily complex.


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