doubleDown questions

doubleDown answers

• Extract XML Value in bash script [duplicate]
• Grep time command output
• Make Bash script exit and print error message if users invoke the script incorrectly
• Is there any difference between '=' and '==' operators in bash or sh
• Keep only the 1st line in every 4 lines and delete the other lines [duplicate]
• How can I use the cl command on PowerShell?
• .bashrc does not read environment path correctly with spaces
• Using regex in find command for multiple file types [duplicate]
• String manipulation, optional character
• Check if file is in a given directory (or sub-directory) in bash