Commands using less (60)

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restart apache only if config works
making lots of configurations to apache and restarting the server only to find it broken just plain sucks.

a function to find the fastest DNS server
http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list.

Rename many files in directories and subdirectories
This is probably overkill, but I have some issues when the directories have spaces in their names. The $ find . -type d -print0 | while read -d $'\0' dir; do xxx; done loops over all the subdirectories in this place, ignoring the white spaces (to some extend). $ cd "$dir"; echo " process $dir"; cd -; goes to the directory and back. It also prints some info to check the progress. $ find . -maxdepth 1 -name "*.ogg.mp3" -exec rename 's/.ogg.mp3/.mp3/' {} \; renames the file within the current directory. The whole should work with directories and file names that include white spaces.

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

git remove files which have been deleted
It deletes all removed files, updates what was modified, and adds new files.

purge all packages marked with 'rc'
After you install/remove lots of packages, there are many packages marked with 'rc'. This script help you to purge these packages, it will save some spaces from your disk.

Make vim open in tabs by default (save to .profile)
I always add this to my .profile rc so I can do things like: "vim *.c" and the files are opened in tabs.

Generate an XKCD #936 style 4 word passphrase (fast)
This restricts things 3 ways: 1. No capitalized words, hence no proper names. 2. No apostrophes. 3. Restricts size to range (3,7)

Blue Matrix
Same as original, but works in bash

A very simple and useful stopwatch
time read -sn1 (s:silent, n:number of characters. Press any character to stop)


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