This easy. Just type logger on the command line and your message will be added to the end of the /var/log/syslog file. $ logger comment to be added to log $ tail -1 /vvar/log/syslog May 21 18:02:16 ...

The script command not only makes a record of what commands you run but also allows you to save the output generated so that you can examine it later or easily turn your command sequences into scripts ...

The printf command offers well-defined behavior following the POSIX standard, which means it works the same way across shells ...

You will most often use Bash functions to make your shell life easier; instead of typing out complex command pipelines, ...

If you've written any amount of bash code, you've likely come across the trap command. Trap allows you to catch signals and execute code when they occur. Signals are asynchronous notifications that ...

It is easy to dismiss bash — the typical Linux shell program — as just a command prompt that allows scripting. Bash, however, is a full-blown programming language. I wouldn’t presume to tell you that ...

A recent post about debugging constructs surprised me. There were quite a few comments about how you didn’t need a debugger, as long as you had printf. For that matter, we’ve all debugged systems ...