Commands by snorf

Commands by snorf (2)

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Calculate CPU load limit on GNU/Linux

shell order of operation example which calculates: x = number of physical CPU's y = number of cores per CPU 2(x * y) + 1 = CPU load limit Show Sample Output
This is sample output - yours may be different.
```
9
```
0

echo "$(( $(( $(grep 'physical id' '/proc/cpuinfo' | uniq | wc -l) * $(grep 'core id' '/proc/cpuinfo' | wc -l) )) * 2 + 1 ))"

snorf · 2015-11-14 20:44:39 1
create 7 variables using output of date command

minimal oneliner to keep track of time Show Sample Output
This is sample output - yours may be different.
```
echo $year $month $day $hour $minutes $seconds $epoch
2015 11 10 23 24 21 1447226661
```
0

read year month day hour minutes seconds epoch _ < <(date '+%Y %m %d %H %M %S %s')

snorf · 2015-11-11 07:27:37 0

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Quick syntax highlighting with multiple output formats

You can specify various output formats, theme styles, etc. $ python -m pygments -o source.png source.py $ python -m pygments -o source.rtf source.py Check available output formats, styles, etc.: $ python -m pygments -L Find pygments module here: http://pygments.org/

Send a backup job to a remote tape drive on another machine over SSH

I use this all the time for taking manual backups of stuff i want to keep but not important enough to backup regularly.

OSX command to take badly formatted xml from the clipboard, cleans it up and puts it back into the clipboard.

This command can be used with xclip or xsel for use on a linux box.

Display last exit status of a command

The variable ? contain the last exit status of a command, it can be printed for troubleshooting purpose.

Recall last argument of previous command

!$ recalls the last argument of the previous command. This is very useful when you have to operate several operations on the same file for example.

Show (only) list of files changed by commit

Lists ONLY the files changed by the given HASH/HEAD/list of hashes, etc. The message, commit ID, author, etc. is not included

Find Duplicate Files (based on size first, then MD5 hash)

This dup finder saves time by comparing size first, then md5sum, it doesn't delete anything, just lists them.

Assign function keys to your frequent commands

This is a common use of bind. Hitting any key after will output the key's character sequence. This makes possible using it into a bind command. So pressing ctrl+v and then F2 will output "^[[12~", once binded every time you'll press the function key F2 it will execute your command. Added the \n to make it execute it as well.

To print a specific line from a file

You can get one specific line during any procedure. Very interesting to be used when you know what line you want.

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

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