I have Zabbix monitoring disk space for several volumes on several servers. It works fine on all of them except for one of the volumes on one of the servers which always reports as 0. However, when I run
./zabbix_get -s localhost -p 10050 -k 'vfs.fs.size[/home, free]'
locally on the machine in question, it gives me the correct, non-zero size which matches the output of df.
How can I go about troubleshooting and correcting this problem?
How can I sort the /dev directory by type and major and minor device number when doing ls -l?
The best way I've found so far is:
ls -l /dev | sort -k 1.1,1.2 -k 5n -k 6n | less
Is there a better way?
Is it possible to conceal the existence of a malicious alias in Bash on a Linux system and have it executed by the user without their knowledge?
What is the difference between these two commands?
. filename # (A)
and
filename # (B)
And how is this command related?
./filename # (C)
Note: The # and the rest of the line after it are comments.
I have a user who has some of his temp files being created in the root directory of the C: drive on his Vista notebook.
System Properties > Advanced > Environment Variables > User Variables for USER NAME > TEMP (and TMP) both show "%USERPROFILE%\AppData\Local\Temp"
Under System Variables, they both point to "c:\windows\temp"
If I go to a cmd prompt and type "echo %USERPROFILE%" I get "c:\Users\USER NAME". Typing "echo %TEMP%" gives "c:\Users\USERNA~1\AppData\Local\Temp" as does "echo %TMP%".
I don't see any problems in other environment variables.
Obviously, this user somehow set his root directory to be writeable.
Any explanation why these files are going there and what to do about it?
In this answer on SO, I gave an example that should have used a -SIGCONT signal in a job submitted to at. However, I found that the process that I had stopped with -SIGSTOP did not continue. When I changed the signal to the numeric value, it worked.
echo "kill -18 $rspid"|at now + 2 minutes
It's a bad idea to use the numeric value because it can be different on different systems.
How can I submit this job with a symbolic signal (-SIGCONT) instead of the numeric one (-18)?
Windows Vista, OS X and Linux (e.g. Ubuntu/Gnome) each ask for permission when certain operations are performed. I know when I've initiated such an action most of the time. Occasionally, I'm not expecting the dialog to pop up because I don't consider what I've requested to be needing permission. This makes me nervous.
How easy is it for some mal-ware to spoof such a dialog? I would say it's probably trivial.
What can be done to prevent getting caught by this?