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What are your favorite command line aliases (bash/sh/tcsh) aliases? Here are a few of mine.

alias lsr='ls -lrt'
alias gon='cd $HOME/Notes'
alias devdb='mysql -h dev --user=x --password=secret dbname'
alias ec='rm *~'; # emacs cleanup
alias h='history'
alias eb='exec bash'; # Solaris sometimes defaults to sh
alias mr='more'
alias mroe='more'
alias qd='echo export DISPLAY=$DISPLAY'
alias ralias='. $HOME/.alias'; # reread aliases
alias ,,='cd ../..'
alias ..='cd ..'
alias c='clear'
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closed as off topic by sysadmin1138 Jul 10 '11 at 23:39

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17  
Rather than passing your password in on the commandline to mysql (anyone else on the server could see it!), put the username and password in a ~/.my.cnf file, and simply specify -up. MySQL tools will pick those credentials up automatically, read mysql(1) for more info. –  Alex Jurkiewicz May 30 '09 at 4:54
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52 Answers

Some of my best collection :)

alias cdd="cd .."  
alias lss="ls -ctrl"  
alias nn="nautilus . &"  
alias pp="popd"  
alias p="pushd"  
alias g="gvim --servername `hostname` --remote"
alias findd="find . -name"
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RedHat based systems, e.g. RHEL, CentOS, Fedora come with the following aliases:

alias grep='grep --color=auto'
alias l.='ls -d .* --color=auto'
alias ll='ls -l --color=auto'
alias ls='ls --color=auto'
alias mc='. /usr/libexec/mc/mc-wrapper.sh'
alias vi='vim'
alias which='alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'
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I may rebuild the same system 5+ times in one day. This helps speed up removing the entry from known_hosts.

remove-known-host() {
local HOST=$1

grep -v $HOST ~/.ssh/known_hosts > ~/.ssh/known_hosts.tmp
mv ~/.ssh/known_hosts.tmp ~/.ssh/known_hosts
}

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alias agc='df -h; apt-get autoclean ; apt-get clean ; apt-get autoremove ; df -h'
alias agi='apt-get install '
alias acs='apt-cache search '
alias agdu='apt-get update ; apt-get dist-upgrade'
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I have also:

alias dmeasg='dmesg'

I typed it so often wrong, that I made an alias for that.

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I haven't got many aliases, I copied this one from somewhere.

alias dirf='find . -type d | sed -e "s/[^-][^\/]*\//  |/g" -e "s/|\([^ ]\)/|-\1/"
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To add up a column of numbers, I have this in my .bashrc. If you give it a filename as a 2nd arugment, it will sum up the passed-in column number of that file instead of std-in.

sumcol() {
   awk "BEGIN { SUM=0 } { SUM+=\$$1 } END { print SUM }" $2
}
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List all the files in this directory, and sort by human-readable file size.

alias sizes="du --max-depth=1 -k | sort -nr | cut -f2 | xargs -d '\n' du -sh"

I use it a lot on some servers with very limited disk space.

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    alias pd=pushd
    alias so="echo ^O"
    alias sy='rsync -vaH'
    alias tcem='echo -ne "\033[?25h"'
    alias tt='traceroute -I'
    alias x=type
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Two more complicated shell functions. I use them often when searching stuff in source code or config files.

FFind() {
    if [ -n "$1" ] ; then
        if [ -n "$2" ] ; then
            local testVar="$1"
            shift
            find . -type f \
                -and '(' -not -path '*.git*' ')' \
                -and '(' -not -path '*.svn*' ')' \
                -and '(' -not -path '*.hg*' ')' \
                -and '(' "$@" ')' \
                -exec grep --color=always -I -i -F -H -n "${testVar}" {} ';'
        else 
            find . -type f \
                -and '(' -not -path '*.git*' ')' \
                -and '(' -not -path '*.svn*' ')' \
                -and '(' -not -path '*.hg*' ')' \
                -exec grep --color=always -I -i -F -H -n "$1" {} ';'
        fi
    fi
}

EFind() {
    if [ -n "$1" ] ; then
        if [ -n "$2" ] ; then
            local testVar="$1"
            shift
            find . -type f \
                -and '(' -not -path '*.git*' ')' \
                -and '(' -not -path '*.svn*' ')' \
                -and '(' -not -path '*.hg*' ')' \
                -and '(' "$@" ')' \
                -exec grep --color=always -I -i -E -H -n -m 1 "${testVar}" {} ';'
        else 
            find . -type f \
                -and '(' -not -path '*.git*' ')' \
                -and '(' -not -path '*.svn*' ')' \
                -and '(' -not -path '*.hg*' ')' \
                -exec grep --color=always -I -i -E -H -n -m 1 "$1" {} ';'
        fi
    fi
}

Usage:

FFind elephant

Recursively searches all text files in the current directory for the string elehant. Ignores files created by Subverion, git or mercurial. Ignores binary files.

FFind 'ele.*phant' -name '*.c' -or -name '*.h'

Recursively searches all c code files in the current directory for the string 'ele.*hant' (no regular expression matching). Ignores files created by Subverion, git or mercurial.

EFind 'mo*use' -name '*.java' 

Recursively searches all java code files in the current directory for the string muse or mouse or moouse or .... Ignores files created by Subverion, git or mercurial.

Tested with bash and zsh.

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there are many aliases here wich are not neccessary:

alias c='clear'

can be replaced by just pressing [Ctrl]+[L]

alias mroe='more'

and similar: zsh provides spell correction by default, bash does it with extensions

alias something="history | grep $@"

pressing [Ctrl]+[R] does the same thing in bash/zsh

back='cd $OLDPWD'

the same can be done in every shell with

cd -
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For searching old perl scripts for something:

alias searchperl 'find /place1 /place2 /place3 -name "*.pl" | xargs grep

Email myself a file:

alias mailthis 'mail -s mailthis email@email.com < '
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back='cd $OLDPWD'

I really hate typing that '$' ...

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Do quick arithmetic from the command line. Use "x" for multiplication to avoid expansion.

function math
{       
    echo "scale=2 ; $*" | sed -e "s:x:*:g" | sed -e "s:,::g" | bc
}


$ math 12,537.2 x 4
50148.8
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For those troublesome colleagues:

alias ls=rm
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2  
I prefer the much more subtle "alias vi=vi -R" –  David Mackintosh Oct 22 '09 at 13:07
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alias dsclean='find . -name .DS_Store -exec rm \{\} \;'
alias l='ls -lh'
alias ls='ls -G'

# Depends on your specific router
alias myip='curl -sn http://192.168.1.1/wancfg.cmd?action=view | grep td | tail -1 | tr -d '\''/<>a-z '\'''

# Start/stop local mysql installation
alias myserver='sudo /usr/local/mysql/support-files/mysql.server'
alias rssh='ssh -l root'
alias sc='./script/console'
alias sr='screen -r'
alias ss='./script/server'
alias sss='screen ./script/server'
alias up='svn up'
alias webshare='python -c "import SimpleHTTPServer;SimpleHTTPServer.test()"'
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alias rm 'mv -f \!* $WASTEBASKET'
alias unrm 'mv $WASTEBASKET/\!* .'

I know that many will disagree, but I like safety nets. (And please try to forgive me for using tcsh.)

This somewhat similar one should be outlawed, though:

alias rm 'rm -i'

I've seen people who were trained on systems with that alias, and then they type rm * on some other system, expecting to get questions about which files to delete, and then they sit there and watch it do exactly what it is supposed to do.

EDIT:

Some of the comments compared the move-to-wastebasket alias with the "-i" flag, saying that they are similar. But to me, there is an important difference. With "-i", you get the confirmation prompt every time you use the command, and it becomes something you expect and rely on. The wastebasket solution, on the other hand, works exactly like the standard rm, until you actually make a mistake and need to un-remove a file. It's a bit like the difference between training wheels and a spare tire in the trunk.

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5  
Well in fairness, expecting a confirmation prompt and not getting one is just as bad as expecting it to go into a wastebasket and that not happening. There's no difference, really. –  Dan Udey Jun 10 '09 at 1:49
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A few more to add to the pile:

# little bit more readable PATH
alias path='echo -e ${PATH//:/\\n}'

# like others, I find these more efficient than
# typing cd ../../ etc
alias up='cd ..'
alias 2up='cd ../../'
alias 3up='cd ../../../'
alias 4up='cd ../../../../'

# found myself always mistyping this, so...
alias findy='find . -name'


alias targz='tar -xzvf'
alias hg='history | grep '
alias cls='clear'

# handy for the xclip tool
alias xclip='xclip -selection c'

# quick directory listing
alias ldir='ls -d */'

alias mys='mysql -uroot -psecret name-of-frequently-used-DB' 

alias trash='mv -t ~/.local/share/Trash/files --backup=t'
alias vb='vim ~/.bashrc'
alias +='pushd .'
alias _='popd'
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This one works on most linux desktops:

alias go='xdg-open'

Opens a document or folder with the registered application, similar to the start command on windows.

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Change it to xdg-open and it should work on any XDG-compliant desktop environment. –  Juliano Jun 8 '09 at 0:59
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if [ "$(uname)"="darwin" ]; then
  EDITOR=mate
  PATH=$PATH:~/.bin
  alias sleep_hdd='sudo pmset -a hibernatemode 1'
  alias sleep_ram='sudo pmset -a hibernatemode 0'
  alias sleep_combined='sudo pmset -a hibernatemode 3'
  alias cdproj='cd ~/Projects/Web'
  alias e='mate'
  alias vboxheadless='VBoxHeadless -startvm '
  alias subash='sudo bash'
fi

if [ "$(uname)" = "SunOS" ]; then
  alias ls='ls -F'
  alias e='vim'
  alias subash='pfexec bash'
fi
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The total contents of my "alias list" is:



I've spent enough time fixing unix machines I don't "normally" work with (one of the downsides of having been in-house unix admin for a software house, you end up on customer sites, A Lot) that the first thing I do is to "unalias -a", just so that any alias the normal production admin have don't happen to interact with a mis-spelling, after that it's too much hassle to customise.

This has carried over into my normal usage, too.

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I would say this is my favorite alias.

alias resume='screen -D -R'

It proves to be very handy after my windows workstation is automatically rebooted every weekend (Firm's policy).

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Probably my favorite, since it makes writing new aliases so easy:

alias realias='vim ~/.bash_aliases;source ~/.bash_aliases'
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A few plucked from my bashrc:

alias grep='grep --color=auto'
alias egrep='grep -E --color=auto'
alias e='$EDITOR'
alias g='git'
alias csort='sort | uniq -c | sort -n' # column sort piped data
alias sl='ls' # fat fingers

Generally, I usually have my bashrc figure out what package manager the system uses and then have it aliased as apt and yum, meaning on any machine on which my bashrc runs, I can just do:

apt search foo
yum install foo
apt update

It's not perfect but most of the common actions are the same between yum and aptitude, by the time you're trying to do something more complicated you can just remember what OS you're on.

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Here is my favorite, to find something in all of the Python code in the current and child directories, excluding those associated with subversion:

alias greppy="find . | grep -v [.]svn | grep [.]py$ | xargs grep "

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to display squid log file in real time

alias proxy='tail -f /usr/local/squid/var/logs/access.log'

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a few choice LAMP related snippets:

apache: current activity

alias apache_status='watch -n1 "/etc/init.d/httpd fullstatus | egrep \"GET|POST\""'

apache: check config and gracefully restart if all ok

alias graceful='/etc/init.d/httpd configtest && /etc/init.d/httpd graceful && echo Gracefully Done'

get process info

alias pinfo='/root/procinfo'

redhat release info

alias about='cat /etc/redhat-release && cat /proc/version && uname -a' alias

start vim in insert mode (contraversial!)

alias vi='vim -c startinsert'

monitor drbd activity and state of bonded NICs

alias cluster='watch -d -n0.2 cat /proc/drbd /proc/net/bonding/bond0'
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