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By sourcing the file, you are executing the commands in as though they existed in the current file, .bashrc in this case.This has the effect of setting the environment variables for the current shell as you desire.# /etc/bashrc # System wide functions and aliases # Environment stuff goes in /etc/profile # By default, we want this to get set. if [ $UID -gt 99 ] && [ "`id -gn`" = "`id -un`" ]; then umask 002 else umask 022 fi # are we an interactive shell?Other command directories can be added to this list of directories by adding them to the PATH variable.You can choose to make a user-specified directory available for a single user or the entire system, depending on your company's requirements. Type the line: PATH=/path/to/command/directory:$PATH in the file.Replace "/path/to/command/directory" with the exact path to the directory you want to add.

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Typically these commands are located in the /usr/sbin, usr/bin and /sbin, and /bin directories.

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This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant.

Welcome to Linux Questions.org, a friendly and active Linux Community. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration.

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Updates are required not only because of the new hardware coming into the market, but also for improving the overall performance and taking care of security issues. One is called the incremental update, and the other is the major update.

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