How do I export a variable in shell?

How do I export a variable in bash shell?

Export Variables1vech=Bus. Display the value of a variable with echo, enter:2echo "$vech" Now, start a new shell instance, enter:3bash. Now, display back the value of a variable vech with echo, enter:4echo $vech. ... 5export backup="/nas10/mysql" echo "Backup dir $backup" bash echo "Backup dir $backup" ... 6export -p.

How do you export from shell?

Export is defined in POSIX as The shell shall give the export attribute to the variables corresponding to the specified names, which shall cause them to be in the environment of subsequently executed commands. If the name of a variable is followed by = word, then the value of that variable shall be set to the word.

Why do we need to export variables in shell?

It means that the shell's child processes do not inherit the shell's variables. The user must export the variables to make them available to child processes. This tutorial will show you how to export Bash variables in Linux using the export command. Access to the terminal/command line.

What is export command in shell script?

The export command is a built-in utility of Linux Bash shell. It is used to ensure the environment variables and functions to be passed to child processes. It does not affect the existing environment variable. Environment variables are set when we open a new shell session.