Display custom message after the vagrant machine is started.
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How to get service PID using systemctl
Use systemctl to get process identifier for specified service.
Today I will extend the how to fix device excluded by a filter blog post to include information on how to wipe filesystem or partition-table signatures except for LVM2 members, which is a great idea for automation.
Use vagrant provisioner to update SSH authorized_keys every time the virtual machine is started.
You can directly inspect kernel slab allocator statistics (/proc/slabinfo file) for detailed information on buffer, inode, dentry, or other caches in the Linux kernel, though slabtop utility will sort and pretty-print information in real-time.
Define IP address inside multi-domain SSL certificate.
Four different ways to disable Network Manager connectivity checks.
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How to get package URL on CentOS
Sometimes I need to get the package URL on CentOS to store it using Nexus Repository Manager. At first glance, it is not very obvious how to display package URLs, but the actual process is very simple.
Use Nginx reverse proxy to add Content-Security-Policy header and disable phoning home or external analytics inside web-browser.
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How to dry-run CentOS upgrade process
Use tsflags plugin to test upgrade process before executing it.