To be fair, using sed does give you quite a bit more power and capability, but if you're just doing something simple like removing an extension and appending a PID to a variable to make a quick temp ...

A program (binary, or executable) is a file on disk somewhere, in a recognized format. Common formats include ELF on Linux, ...

We can then run the script by $ ./script_name. Alternatively, we could use $ bash script_name. In This method we don't need to make the file executable. All shell commands and scripts generate a ...

Storing into variables is similar to Forth, too, using ! and @ with the RPN-style notation. In fact, it all looks like Forth from swap and drop to the way if controls conditionals.

Biz & IT Bug in Bash shell creates big security hole on anything with *nix in it [Updated] Could allow attackers to execute code on Linux, Unix, and Mac OS X.

For example: $ echo $$ 3243 If you're doing a lot with subshells or spawning subcommands, another useful variable is $!, which is the process ID of the most recently spawned background command. I've ...