Some useful Unix/Linux Bash alias
Some useful Bash #Linux alias taken from my user profile. If you have a long command that you type frequently consider putting it in as an alias.
In computing, alias is a command in various command line interpreters (shells) such as Unix shells, 4DOS/4NT and Windows PowerShell, which enables a replacement of a word with another string. It is mainly used for abbreviating a system command, or for adding default arguments to a regularly used command. [WikiPedia]
| Description | |
| Find all directories and and chmod them to rwxr.xr.x | alias fixpermD=’find . -type d -exec chmod 755 {} \;’ |
| Find all files and and chmod them to rw.r..r.. | alias fixpermF=’find . -type f -exec chmod 644 {} \;’ |
| Both above and set recursively user and user group in one shot | alias fixUserAPerms=’fixpermF; fixpermD; chown -R userA .;chgrp -R usergrp .’ |
| Make a directory and all files recursively read only, secure but a pain to maintain. see next | alias ro=’find . -type f -exec chmod 444 {} \;find . -type d -exec chmod 555 {} \;’ |
| Make a directory and all files recursively read write, just the time to update your site. | alias rw=’find . -type f -exec chmod 644 {} \;find . -type d -exec chmod 755 {} \;’ |
| Lower case all files in current directory | alias lowercaseallfiles=’for f in *; do mv $f `echo $f | tr [:upper:] [:lower:]`; done’ |
| List all open connections to your server | alias listOpenConnections=’lsof –i’ |
| List all internet connections | alias listinternetconnection=’netstat –lptu’ |
| find the 10 biggest in size directories | alias dirsizes=’du -cks * | sort -n | tail –10′ |
| Show open port | alias openports='netstat -nape --inet' |
