Teach us something technical: command line

history.sh

# set these in your .bash_profile, .bashrc, .zshrc first
HISTFILESIZE=100000 # how many lines to keep total
HISTSIZE=100000     # how many lines to keep for the current session
# oh-my-zsh will default to a reasonable 10000, but most bash defaults to a few hundred
# oh-my-zsh by default appends all commands to history after they are run instead of on session end

# search the history with control-r
# search for commands starting with the one you typed with alt-p

# if you don't want something to stay in your history, prefix the command with a space
# on zsh, setopt HIST_IGNORE_SPACE

# most used commands
history | tr -s ' ' | cut -f3 -d ' ' | sort | uniq -c | sort -nr | head -n 30

# most used commands including args
history | tr -s ' ' | cut -f3- -d ' ' | sort | uniq -c | sort -nr | head -n 30

# when you forget to sudo
sudo !!

# when you don't want to type out the args again
cp a-very-long-file-name.txt a-very-long-file-name.txt.bak
subl !^