Bash Set Environment Variable For Command

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How To Set Environment Variables In Bash On Linux

Environment variables are used in Linux to define the settings and configuration of the terminal window and shell There are different types of environment variables including system wide variables session wide variables and shell specific variables Environmental variables are variables that are defined for the current shell and are inherited by any child shells or processes. Environmental variables are used to pass information into processes that are spawned from the shell. Shell variables are variables that are contained exclusively within the shell in which they were set or defined.

How To Set Environment Variables In Linux

Bash Set Environment Variable For CommandIn order to set a permanent environment variable in Bash, you have to use the export command and add it either to your ".bashrc" file (if this variable is only for you) or to the /etc/environment file if you want all users to have this environment variable. $ nano /home/user/.bashrc # Content of the .bashrc file export VAR="My permanent variable" 5 Answers Sorted by 90 It s because in your first case your current shell expands the HELLO variable before running the commands And there s no HELLO variable set in your current shell env HELLO Hello World echo HELLO will do this expand any variables given in this case HELLO

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