Commands by amaymon (8)

What's this? is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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Delete backward from cursor, useful when you enter the wrong password

vim insert current filename
insert filename Normal mode: "%p Insert mode: %

determine if tcp port is open
for udp nmap -sU -p 80 hostname

Display summary of git commit ids and messages for a given branch
Useful when quickly looking for a commit id from a branch to use with git cherry-pick.

Check if you partition are aligned
To get most of you HDD/SSD driver you need to make sure you partition are aligned, if not the speed penalty can be up to 50% slower! this simple one liner will check to see if each partition start sector is divided by 512 you need to change sda with your driver if you find the one of your partitions is not aligned use gparted to move the start sector of the partition to be divided of 512

find files ignoring .svn and its decendents

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

When was your OS installed?
Show time and date when you installed your OS.

ROT13 whole file in vim.
gg puts the cursor at the begin g? ROT13 until the next mov G the EOF

List all symbolic links in a directory matching a string
Finds all symbolic links in the specified directory which match the specified string pattern. I used this when upgrading from an Apple-supported version of Java 6 (1.6.0_65) to an Oracle-supported version (1.7.0_55) on Mac OS X 10.8.5 to find out which executables were pointing to /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands (Apple version) vs. /Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/bin (Oracle version). However, it appears the current JDK installation script already takes care of modifying the links.

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