Fix “device excluded by a filter” LVM error.
Create the simplest possible firewall using nftables framework with relaxed rules that will allow all outgoing traffic, incoming ICMP echo requests, and ssh connections.
Display physical volumes associated with the volume group.
Use templates inside shell scripts by substituting environment variables.
versionlock plugin to protect packages from being updated on the CentOS operating system.
I have already described how to strace PHP-FPM processes, but you can also display a strace summary to get detailed information about count time, calls, and errors for each syscall.
Determine and set
JAVA_HOME to execute Java command-line applications.
Monitor file system events to restart service on every configuration change.
Fix multipath daemon error about missing path when using VirtualBox.
varnishlog to log specific Varnish requests.