/etc/profile

/etc/profile is a system-wide configuration file in Linux-based operating systems that is executed whenever a user logs in. It sets environment variables, defines command aliases, and performs other system-wide configurations that are applied to all users on the system.

The /etc/profile file is typically used to set global environment variables that are used by all users on the system. This includes setting the PATH variable, which specifies the directories where executable files are located, as well as other variables that affect how programs behave.

The file is typically edited by system administrators and advanced users who need to make changes to the system-wide configuration. Changes made to this file take effect the next time a user logs in or when a new shell is opened.

It is important to be careful when editing the /etc/profile file, as any mistakes can have system-wide consequences. It is recommended to make a backup of the file before making any changes.