Fix “device excluded by a filter” LVM error.
Category: SysOps
System Operations
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.
How to use templates inside shell scripts
Use templates inside shell scripts by substituting environment variables.
Use versionlock
plugin to protect packages from being updated on the CentOS operating system.
How to display strace summary
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.
How to define JAVA_HOME
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.
How to log specific Varnish requests
Use varnishlog
to log specific Varnish requests.