Some simple bash hints

• Command
• ls - list files
• --color=auto: Display files with different colors base on their types
• -C: Display files by column
• set - showing all environment variables
• du - show file size
• -s: summary
• -h: human readable
• cd
• -: go to the previous directory
• history - show command history
• use '!' rerun the command. e.g. !4
• '!!' will run last command
• '!-2' will run the second last command
• use 'export HISTCONTROL=ignoredups' to get rid of duplications
• basename - show the name of a file. (remove directory path)
• can also be used to remove suffixes by add a 2nd argument with the suffixes
• dirname - show the directory of a file