Bash wait Command
wait is a command that waits for the given jobs to complete and returns the exit status of the waited for command.
Find and Replace in Vim / Vi
Find and replace is a powerful feature of Vim, which allows you to make changes to your text quickly.
Bash: Write to File
This article explains how to write text to a file in Bash, using the redirection operators and tee command.
Bash read Command
read is a bash built-in command that reads a line from the standard input (or from the file descriptor) and split into words.