On some Linux distributions, systemd log files are not saved on your disk, but only temporary in the memory and when you reboot all logs…
Tag: centos 7
Failed to start Security Audit Service, Authorization Manager and Login Service
A power outrage caused one of our servers to shut down unexpectedly and after it had been powered up the server did not show up….
simple time synchronization of a server (laptop, desktop) using built-in systemd-timesyncd service
Here we offer you a relatively new way of keeping your server’s time (or your computer and laptop) synchronized with a reliable time service on…
Unpack centos 7 initramfs file with and without dracut skipcpio
In CentOS 7 the initramfs consists of two concatenated gzipped cpio files. If you want to check what files and probably configuration files are included…
SSD cache device to a hard disk drive using LVM
This article is to show how simple is to use an SSD cache device to a hard disk drive. We also included statistics and graphs…
Centos 7 Server hangs up on boot after deleting a software raid (mdadm device)
We have a CentOS 7 server with a simple two hard drives setup in RAID1 of total 4 devices for boot, root, swap and storage….
LSI MegaRAID 2108 freezes with abort command and all processes hang up in disk sleep
It happened to one of our old LSI MegaRAID 2108 controllers (AOC-USAS2LP-H8iR (smc2108) with 36 disk, 32x2T and 4x8T) to freeze and most of the…
systemd service freezes in activating (start-post) status – mysqld or other services
We’ve experienced this with the MySQL server under CentOS 7, but you can have this state with other services! After updating our MySQL we tried…