Commands by leonza99

Commands by leonza99 (3)

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Delete all empty lines from a file with vim

This command delete all the empty lines (include the lines with space) from a file. g = global command \S = non-whitespace character; !\S the opposite d = delete a range
This is sample output - yours may be different.
16

:g!/\S/d

leonza99 · 2009-03-02 23:58:45 18
replace a character/word/string in a file using vim

Replace all ocurrences in the file. The g option is to replace more than one occurrence in the same line. Whitout the g option, it only replace the first occurrence in the line.
This is sample output - yours may be different.
2

:%s/old/new/g

leonza99 · 2009-03-02 03:01:13 8
quickly rename a file
This is sample output - yours may be different.
112

mv filename.{old,new}

leonza99 · 2009-03-02 02:28:55 40

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restoring some data from a corrupted text file

man tac When there is a bad block in the middle of your file, you can see its begninning with `cat' and its end with `tac'. But both commands terminates with an error. So this sequence rebuilds a new file without badblock.

Show me just the ip address

Sometimes it's useful to output just the ip address. Or some other information, changing the "ipv4.addresses" in command. The power of awk! Show all possible "greps" with $ nmcli connection show [yourInterfaceNameHere]

Print average GPU core temperature

check open ports (both ipv4 and ipv6)

Save a file you edited in vim without the needed permissions (no echo)

Write a file you edited in Vim but that you do not have the permissions to write to (unless you use sudo.) Same as #1204 but without the echo to stdout that I find annoying.

HTTP redirect

any HTTP requests to the machine on the specified port will be redirected to http://www.whatevs.com... quick, dirty, works fine for sites w/

use screen as a terminal emulator to connect to serial consoles

Use GNU/screen as a terminal emulator for anything serial console related. screen /dev/tty eg. screen /dev/ttyS0 9600 MacOSX: http://www.macosxhints.com/article.php?story=20061109133825654 Cheat Sheet: http://www.catonmat.net/blog/screen-terminal-emulator-cheat-sheet/

Compare directories via diff

http://hints.macworld.com/article.php?story=20070408062023352

a simple bash one-liner to create php file and call php function

Batch rename extension of all files in a folder, in the example from .txt to .md

Batch rename extension of all files in a folder, in the example from .txt to .md mmv most likely must be installed, but is very powerfull when you want to move/copy/append/link multiple files by wildcard patterns.

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