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[12 Mar 2019 | 3 Comments | 1,612 supporters]
Cpanel server infected with mining software

Recently one of server under my control infected with mining software. It cause unnecessary load and waste of server resource.
Since the server is using Cpanel, I must use WHM to track down the source. I check WHM ‘Process Manager’ and ‘Daily process log’ and found something similar like :
impxxxx impxxxxketing.com 98.5 -bash -a cryptonight -o stratum+tcp://xx.xx.xx.xx:14444 -u

Linux tips »

[11 Mar 2019 | One Comment | 1,578 supporters]
Clussterssh cannot connect

When using clusterssh sometime cannot connect to cssh due to recent upgrade.

gatekeeper@localhost:~> cssh
Connection to server failed — (version 11.0)
No protocol specified
at /usr/lib/perl5/vendor_perl/5.26.1/App/ClusterSSH.pm line 1983.
gatekeeper@localhost:~> echo $DISPLAY

Linux tips »

[10 Mar 2019 | No Comment | 736 supporters]
How to debug a crash Centos server

This is simple guide on how to debug crash Centos server using kernel crash dump. The program we use is Kdump. When a kernel crash or kernel panic, the program will dump everything into a vmcore file for us to troubleshoot the cause of the crash. By analyzing the crash we could determine what is the root cause of the crash or we could send the crash dump to someone if we not familiar on how to read the dump file.