Terminal Utils

bash.sh

#!/usr/bin/env bash

## list content folder with size in human readable format
$ ls -lh

## file size in human readable format
$ du -h filename

## folder size in human readable format
$ du -msh folderName


## zip entire folder
$ zip -r myfiles.zip mydir
#or
$ tar -zcvf archive-name.tar.gz directory-name


## compress entire folder excluding some sub folder
$ tar --exclude='./folderName/subfolder2' --exclude='./folderName/subfolder1' -zcvf /backup/filename.tgz folderName

## uncompress folder
$ tar xf path/to/tar.gz -C path/to/destination/

## download or upload file with scp
http://www.hypexr.org/linux_scp_help.php

# Copy the file "foobar.txt" from a remote host to the local host
$ scp your_username@remotehost.edu:foobar.txt /some/local/directory

# Copy the file "foobar.txt" from the local host to a remote host
$ scp foobar.txt your_username@remotehost.edu:/some/remote/directory

# delete folders older than 10 days
$ find /path/to/base/dir/* -type d -ctime +10 -exec rm -rf {} \;
$ find /path/to/base/dir/ -maxdepth 1 -mindepth 1 -type d -ctime +10 -exec rm -rf {} \; #my version


# check HTTP headers for connectivity to the internet
$ for i in `seq 1 20`; do curl -I http://www.example.com && sleep 10s; done