Bash Script

Category: bash

  • Bash: Find all .hidden files but ignore .htaccess file

    A bash command to search for all hidden files recursively in the current directory but ignore apache .htaccess files. find . -type f \( -iname “.*” ! -iname “.htaccess” \)

  • Snippet to check root privileges

    Snippet to use in your scripts to execute them only if you have root privileges. if [ $UID -ne 0 ]; then echo “Superuser privileges are required to run this script.” echo “e.g. \”sudo $0\”” exit 1 fi  

  • Split and join files

    How to split a file in chunks and how to put them back together. ### SPLIT LONG: split –bytes=5m –suffix-length=2 –numeric-suffixes image.iso image.iso.part_ split –verbose –bytes=5m –suffix-length=2 –numeric-suffixes image.iso image.iso.part_ ### SPLIT SHORT: split -b 5m -a 2 -d image.iso image.iso.part_ split –verbose -b 5m -a 2 -d image.iso image.iso.part_ ### RESTORE cat image.iso.part_* >…

  • HTTP Proxy Checker in bash

    Usefull script  to check if a proxy is alive. #!/bin/bash # HTTP Proxy Server’s IP Address (or URL) proxy_server=$1 # HTTP Proxy Server’s Port Number port=$2 # We’re trying to reach this url via the given HTTP Proxy Server # (http://www.google.com by default) url=”http://www.google.com” # Timeout time (in seconds) timeout=20 # We’re fetching the return…

  • Google URL shortener script

    Maybe it’s no longer working #!/bin/bash # Google url shortener bash script # For information about the app: # http://ggl-shortener.appspot.com/instructions/ app=’http://ggl-shortener.appspot.com/?url=’ url=”$1″ protocol=`echo “$1” | sed -e “/^http:\/\//g”` if [ -z “$1” ]; then echo -e “you need to pass the url through an argument”; echo -e “e.g. `basename $0` http://url”; else if [ !…

  • Fetch last.fm song from bash

    This script let you get a song from last.fm. curl -s http://www.last.fm/user/$LASTFMUSER | grep -A 1 subjectCell | sed -e ‘s#<[^>]*>##g’ | head -n2 | tail -n1 | sed ‘s/^[[:space:]]*//g’

  • Remove RSA key for ssh authorized hosts file

    How to remove an ssh host by name or ip from your authorized hosts file. ssh-keygen -R {server.example.com} ssh-keygen -R {ssh.server.ip.address}

  • Analyse Access Log with awk for most common ip addresses

    Some cat with awk and then sort to find out what ips are most common in your apache access.log file. Remember that all ips are include here. Bots, crawlers, clients… cat /path/to/log | awk ‘{print $3}’ | sort | uniq -c | sort -rn | head -20

  • Empty a database table command

    How to empty a mysql database. Forget about delete * command #!/bin/bash mysql -D $DATABASE -e ‘TRUNCATE TABLENAME;’  

  • SSH Access Email Alert for bashrc

    You want to know instantly who has logged in your ssh server. You can be emailed automatically including in .bashrc file of the user you want to monitor following commands: echo ‘ALERT – Root Shell Access (hostname) on:’ `date` `who` | mail -s “Alert: Root Access from `who | cut -d”(” -f2 | cut -d”)”…