$ chmod +x script.sh

# python2
$ python -m SimpleHTTPServer 8000

# python3
$ python3 -m http.server

# alias
alias http="python -m SimpleHTTPServer 8000"

# substitute and print to stdout
$ sed -e 's/one/first/g' test-file.txt

# substitute in place with backup
$ sed -i '.backup' -e 's/one/first/g' test-file.txt

# substitute in place without backup
$ sed -i '' -e 's/another/next/g' test-file.txt

# count lines of code for jsx files in current folder
$ wc -l `find . -type f -name "*.jsx" | sort -n`

# count lines of code for jsx and css files in current folder
$ wc -l `find . -type f -name "*.jsx" -or -name "*.css" | sort -n`

# count lines of code for tsx files in src folder
$ wc -l `find ./src -type f -name "*.tsx" | sort -n`

# alias
alias wct=$'wc -l `find ./src -type f -name "*.tsx" | sort -n`'

# prune remote-tracking branches no longer on remote
git fetch --prune

# print local branches that are not found on remote
git branch -r | awk '{print $1}' | egrep -v -f /dev/fd/0 <(git branch -vv | grep origin) | awk '{print $1}'

# remove local branches that are not found on remote
git branch -r | awk '{print $1}' | egrep -v -f /dev/fd/0 <(git branch -vv | grep origin) | awk '{print $1}' | xargs git branch -d

#alias
alias gp="git fetch --prune"
alias grm=$'git branch -r | awk \'{print $1}\' | egrep -v -f /dev/fd/0 <(git branch -vv | grep origin) | awk \'{print $1}\' | xargs git branch -d'

git checkout origin/master filename

# list devices with identifiers
$ ~/Library/Android/sdk/emulator/emulator -list-avds

# run in background
$ ~/Library/Android/sdk/emulator/emulator -avd Pixel_2_API_28 &

# list devices with identifiers
$ instruments -s devices

# start Simulator
$ open /Applications/Xcode.app/Contents/Developer/Applications/Simulator.app/

$ sudo lsof -iTCP -sTCP:LISTEN -n -P

$ tar -tvf archive.tar