Using an editor to create commands
If you have a long group of commands you need to run press Ctrl-X, followed by Ctrl-E This will open your default editor. When you’re done close the editor (saving the file) and the command will run.
Print the total bytes of files in a directory grouped by date
ls -l|awk ‘length($6)==3{x[$6″ “$7]+=$5};END{for(i in x)printf”%s:\t%d\n”,i,x[i]}’
Filter duplicate lines from a sorted files
cat list-1 list-2 list-3 | sort | uniq > final.list
Debugging bash scripts
Debugg bash scripts by runing with option -x example bash -x scriptname.sh
lowercase filen names
#! /bin/bash DIR=$1 for a in `ls $DIR` do fname=`echo $a | tr A-Z a-z` mv $DIR/$a $DIR/$fname done; exit 0
bashprofile
# .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/bin:/sbin export JAVA_HOME=/usr/java/jdk1.6.0_05/bin/java export PATH=$PATH:/usr/java/jdk1.6.0_05/bin export HISTIGNORE=”&” export EDITOR=nano export PATH unset USERNAME alias rm=’rm -i’ alias cp=’cp -i’ alias ls=’ls –color’ alias zf=’zf.sh’ echo -e “\033[36m########################## \033[0m” echo -e “\033[36mServer $HOSTNAME \033[0m” echo -e “\033[36mWelcome back $USER \033[0m” echo -e “\033[36musers loggged in: \033[0m” echo -e “\033[36m `users ` \033[0m” echo -e “\033[36m`uptime` \033[0m” echo […]
bashrc
Here is my typical .bashrc file # .bashrc # Source global definitions if [ -f /etc/bashrc ]; then . /etc/bashrc fi # append commenads to bash_history (when using more then one window) shopt -s histappend PROMPT_COMMAND=’history -a’ # User specific aliases and functions PATH=$PATH:$HOME/bin:/sbin #export JAVA_HOME=/usr/java/jdk1.6.0_05/bin/java export HISTIGNORE=”&” export EDITOR=nano export PATH unset USERNAME #function PWD { #pwd | awk -F\/ ‘{print $(NF-1),$(NF)}’ | sed ‘s/ /\\//’ #} #export PS1=”\[\033[0;32m\]\u@\h \[\033[33m\]\$(pwd 3)\[\033[0m\] \$ “;