The awk command can make it easy to remove duplicate characters from a string even when those characters aren’t sequential, especially when the process is turned into a script. First, the awk command ...

How to use awk to select data from commands and scripts Your email has been sent Image: iStock/Inimma-IS Must-read developer coverage What Powers Your Databases? Take This DZone Survey Today!

I love chaining commands as much as anyone, and sed, awk, grep, and perl are some of my best friends. However, remember that, in *nix, each command runs in its own process, the resources required for ...

Is prone to causing confusion for newbies since they are inevitably going to question what happens if the "empty file" does not exist, and what happens once the first command has written the output to ...