On 5/7/2016 4:24 AM, Parham Doustdar wrote:
Top is unusable without such a feature, but you and other people replying to
this thread seem to be using it just fine. So, what tricks do people use in
order to memorize what column is for what value? I have this problem when
reading the output of commands like |free -m|, too.
Well, I just listen very carefully. I've not had a problem with it, but I
see what you mean with top in particular. It's hard to know what's going on
when you hear a bunch of numbers scrolling past. That's why I suggested
parking the cursor, but that doesn't stop the output. I would suggest "top
-n1" to only show the information once or increase the refresh rate as John
suggests.
Regarding free memory, I cheat. You can actually do this with top and most
other commands. In Linux, there is a special filesystem called /proc. It's
worth exploring some time as you can learn lots of useful information. All
top, ps, free and lots of other commands do is reformat the output of files
under /proc to make them look nicer. I don't know what files top uses, but
read the man page. For fun, try the following two commands and let us know
what you think:
cat /proc/meminfo
less /proc/cpuinfo
You can do the same with the ps command. All ps does on Linux is go through
/proc and print out the process names, memory and CPU usage, etc. I find ps
more useful and easier though, especially when there are hundreds of running
processes on most servers.
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