Useful tips for everyday
How do I tell if Apache is Prefork or worker? Enable Apache mod_info. Query the mod_info url, typically curl localhost/server-info. The “Server Settings” section will…
How do I copy a directory to a remote machine locally? You can use either scp or rsync to copy folder and files from local…
How to use Grep and SED in Bash shell script? Then execute grep -v ‘^/\\*.*\\*/$’ var on my updated variable to select some lines with…
Why do I get denied permissions in Linux? While using Linux, you may encounter the error, “permission denied”. This error occurs when the user does…
Do you need a port to Ping to SSH? Ping uses the icmp protocol, which doesn’t require a port. ssh needs port 22 (by default)…
Is btrfs journaling file system? Btrfs is a copy-on-write (COW) file system developed by Chris Mason. It is based on COW-friendly B-trees developed by Ohad…
How do you extend an LVM disk on a RHEL guest machine running on VMware host? Extending a logical volume in a virtual machine running…
Can Raspberry Pi create hotspot? The Raspberry Pi 3 comes with a built-in wireless adapter, which makes it easy to configure it as a WiFi…
What is an ephemeral port group? In a port group configured with ephemeral binding, a port is created and assigned to a virtual machine by…
Is using multiple VPNs safer? If you’re trying to prevent a site operator from identifying who you as a user are, multiple VPNs won’t gain…