Commands by fivestones (2)

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Quickly (soft-)reboot skipping hardware checks
If you are doing some tests which require reboots (e. g. startup skripts, kernel module parameters, ...), this is very time intensive, if you have got a hardware with a long pre-boot phase due to hardware checks. At this time, kexec can help, which only restarts the kernel with all related stuff. First the kernel to be started is loaded, then kexec -e jumps up to start it. Is as hard as a reboot -f, but several times faster (e. g. 1 Minute instead of 12 on some servers here).

Make window transparent (50% opacity) in Gnome shell
Click window to change its opacity. Source: https://unix.stackexchange.com/a/494289

Convert one file from ISO-8859-1 to UTF-8.
Nothing fancy it just converts one file from one character encoding into another one.

Make a file not writable / immutable by root
http://linuxhelp.blogspot.com/2005/11/make-your-files-immutable-which-even.html

Save history without logout
You can use commands that executed on first console from new opened second console. Sometimes it be very useful :)

Random unsigned integer
works at least in bash. returns integer in range 0-32767. range is not as good, but for lots of cases it's good enough.

Open Perl module source in your editor
Ever needed to look at the Perl source of an installed module on your system? This works in 90% of cases.

Remove ( color / special / escape / ANSI ) codes, from text, with sed
Remove ( color / special / escape / ANSI ) codes, from text, with sed Credit to the original folks who I've copied this command from. The diff here is: Theirs: [m|K] Theirs is supposed to remove \E[NUMBERS;NUMBERS[m OR K] This statement is incorrect in 2 ways. 1. The letters m and K are two of more than 20+ possible letters that can end these sequences. 2. Inside []'s , OR is already assumed, so they are also looking for sequences ending with | which is not correct. This : [a-zA-Z] This resolves the "OR" issue noted above, and takes care of all sequences, as they all end with a lower or upper cased letter. This ensures 100% of any escape code 'mess' is removed.

geoip information
Show external IP and geolocation information. Primary feature is the use of tee to echo IP _and_ send to geoiplookup command...Use IP as input for as many commands as you want with more >( [command] ) Thanks to http://www.commandlinefu.com/commands/view/6334/ Requires MaxMind DB and geoiplookup tool. Sample output has IP obfuscated on first line, lines 2-4 from having MaxMind Country && MaxMind City DBs installed

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


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