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May
19
comment cron job occasionally not running
What if you move that particular line to another location in your crontab file? Does some other cron job then start failing? The fact that the cronjob sometimes works makes this more difficult to solve. Have you ever tried to run strace against the cron process around 21:00 and see what it does?
May
11
comment Linux high iowait without block device activity
If your server is connected to a 100 Mbps network, wrong duplex settings could very well cause problems similar to this one.
May
5
comment 500 Internal Server Error on Wordpress - BUT WORKS from a different country
It's perfectly possible to configure mod_security to react only to certain URLs, such as /wp-admin/* and ignore the rest. Of course, not even mod_security is needed for this, one can create such rules with mod_rewrite with ease. First check if there's some strange rules in your .htaccess file in WordPress root directory (or inside the wp-admin directory)
May
5
comment 500 Internal Server Error on Wordpress - BUT WORKS from a different country
Maybe Apache's mod_security + geoip is in use and requests coming from India/another country than USA are being redirected to some page, which returns 500 Internal Server Error?
May
5
comment swapon failed: Device or resource busy on mounted disk
"Swap on, swap off, Daniel-San", like Mr. Miyagi taught the young kid still in his early steps to mastering server-fu.
May
5
comment rsync : write failed - No space left on device (28)
Can you manually create files on that file system? Sometimes when I have seen this situation, file system was somehow corrupted and needed fsck, or the hard drive was dying.
May
5
comment how to check if a process with heavy io usage is running properly
Try nfsstat, and take a look at the numbers both when using your application and when measuring other benchmarks.
Mar
20
comment OpenOffice terminal with no task bars and menu
Please be noted that it's perfectly possible to launch external applications from OpenOffice.org itself! Shell("/path/to/program",1,parameters-the-program-accepts,true) or so.
Mar
13
comment Unable to log in to MySQL
Wrong password, wrong username and/or wrong MySQL instance you are trying to connect. How would we know the answer with such a short description of your problem? In theory, MySQL could be configured in a way that user 'admin' cannot connect from 'localhost' at all, but I suspect that is not the problem.
Mar
12
comment Creating FTP user to access a specific directory with SFTP in Linux Ubuntu Server 14.04 LTS
Since you have only one user to match against, try ChrootDirectory /home/myftpuser or so. Also check out the directory permissions.
Mar
6
comment DB2 crash on production redhat server
Not the server itself, probably. Hard to say with 100% confidence with such little background information -- imagine if we switched places and you should answer to me with only data being two short pastes and no information about other environment whatsoever.
Mar
6
comment DB2 crash on production redhat server
I'm not a psychic so I need lots more data before I can help. I have no idea where that /dev/sdb is connected to and how loaded that target might possibly be. Is that some kind of iSCSI target? A SAN? Are there just a few other virtual machines or hundreds/thousands of them? Is your DB2 server the only one having issues or are other VMs having problems as well? How about the logs at the VMware side? And so on, and so on...
Mar
6
comment How can I permit anonymous access to local user home directory with vsftpd?
Logs. Read the logs. I suspect SELinux being the culprit.
Mar
4
comment email sending speed - how to improve
It's definitely not Postfix which limits performance with that kind of hardware and such low volume of e-mail. It's amavis + the checks it performs via SpamAssassin which slows the overall process down.
Mar
4
comment Unable to get SMART metrics from Seagate Disks on Debian OS
Is SMART enabled in BIOS?
Mar
4
comment Growing memory use
Awesome! Glad I was able to help you, or at least nudge you to right direction.
Mar
4
comment Growing memory use
Very interesting!
Mar
4
comment Growing memory use
Please add the output of slabtop command.
Jan
29
comment MySQL suddenly 'crashed' but not stopped, mysqld_safe 100% cpu on CentOS 6
Is there free disk space left?
Jan
29
comment Low load average, but high %user and %system cpu usage
@BrianLundLarsen: With almost a similar HP model I've experienced VERY bad I/O if the RAID controller had its battery-backed up write cache disabled for some reason. Check that it works and/or see if you have the latest firmwares installed everywhere.