Seven Habits of Highly Effective Unix Admins

jfruh writes: "Being a Unix or Linux admin tends to be an odd kind of job: you often spend much of your workday on your own, with lots of time when you don't have a specific pressing task, punctuated by moments of panic where you need to do something very important right away. Sandra Henry-Stocker, a veteran sysadmin, offers suggestions on how to structure your professional life if you're in this job. Her advice includes setting priorities, knowing your tools, and providing explanations to the co-workers whom you help." What habits have you found effective for system administration?

Number 6 Problem

[magamiako1]

The issue with #6 is that users almost invariably never accept an answer here. And a lot of the time it may be something you can't adequately explain, which is something they don't like even more. Especially if you know the problem wasn't the result of something you did.

#7 Be Appriopriately Lazy

[tiberus]

The first time a task comes up deal with it manually, it may or may not be related to a problem.

The second time this task occurs deal with it manually.

The third time this task occurs, it's time to start scripting.

It may take you a day or more to write the script, test debug, etc. or even longer for complex tasks but, this behavior tends to be a winner. The script is already some degree of documentation, it records the steps, etc. If it's robust enough it can be used to by your support techs to resolve issues, expanding the number of people who can resolve an issue, freeing the admin for other tasks. Scripts tend not to make typos (yes, I know your command line skills are legendary) and can save a lot of time and effort in the long run.

Rebooting is not a fix

[hawguy]

As someone who's managed a team of sysadmins that moved to the Linux world from Windows, I have this tip: "Reboot does not fix anything, it just hides things".

For some reason, Windows admins have been trained to reboot immediately when things don't work well rather than to figure out why something is failing. I'm sure this was a valid "fix" in older versions of Windows, but Windows has been stable for quite some time, and things shouldn't mysteriously stop working for no reason. Take a bit of time to figure out *why* the CPU is suddenly spiking on the database server, since if you reboot it, you will have lost most of the evidence for why it's happening, and it's likely to happen again. If it's a production server and you can't spend much time, run a few diagnostics (ps, "top", lsof, etc) and save to a file for the postmortem, but don't just go in and reboot before looking around.

Re:Rebooting is not a fix

[evilviper]

"Reboot does not fix anything, it just hides things".

That's not specific to rebooting... It's more a question of doing root-cause analysis, versus quick bandaids. I'm firmly in the RCA camp, but sometimes it's the companies that are to blame, rather than the individual admins. Some companies are heavily slanted towards always getting the quickest possible workaround, rather than ever actually finding and fixing the problem. It's one of those false-economies, like counting lines of code and similar.