Useful tips for everyday
What is the inode table? An inode is a data structure on a traditional Unix-style file system such as ext3 or ext4. storing the properties…
How do I enable VNC on RHEL 8? Steps To install the required packages, run the following command as root: [root@vncserver ~]# yum -y install…
When to make a file system available for unmounting? A file system is considered busy if a user is accessing a directory in the file…
Can you read a configuration file in OpenSSL? For example, I’ve found openssl config manual ( https://www.openssl.org/docs/manmaster/man5/config.html ), which says that the config library “can…
Does kernel allocate memory? The kernel usually wants physically contiguous memory. Often, the kernel must allocate the memory without sleeping. Mistakes in the kernel have…
Why is my CD player not reading discs? Sometimes a CD player will display a “No Disc” error. What this means is that the CD…
How do you use a variable inside awk? How to use variable in awk command $ echo | awk -v myvar=’AWK variable’ ‘{print myvar}’ $…
How to boot a system into a different target? # systemctl get-default graphical.target OR # ls -l /etc/systemd/system/default.target The above command will output a name…
How do I switch users in Shell? To change to a different user and create a session as if the other user had logged in…
How do you stop a balloon from memory? To re-enable the balloon driver in a virtual machine: Log into the guest OS. Click Start >…