bash-cli.md

Bash Single Line Scripts

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• Basic command line references - http://www.pixelbeat.org/cmdline.html

• SSH into a box with hidden mode

  ssh user@ipaddress -T shell

  Ex :- ssh madhu@192.168.56.100 -T /bin/bash

• While loop for passing file and read line by line

  while read line; do cat $line; done < file.txt

• Large files in current directory

  find ./ -xdev -type f -size +1G

  you can change location and size of the file by tweaking the command
  

• Get IP addresses from a file using the grep

  grep -E -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'

• Send Emails from terminal

  mail -s "Subject" test@gmail.com

  Ex :- cat ips.txt | mail -s "IP Addresses" google@gmail.com
  
        echo Testing | mail -s "Test Email" google@gmail.com
  

• Pass the output of the command to another command using xargs

  whoami | xargs finger

• Execute and print the command output in VI editor

  :r!whoami