To mount a CD-ROM in Linux, you need to perform the following steps: Insert the CD-ROM into your CD/DVD drive. Create a mount point directory, which is the directory where the CD-ROM will be accessible. For example: mkdir /mnt/cdrom Use the mount command to mount the CD-ROM. For example: mount /dev/cdrom /mnt/cdrom Note that /dev/cdrom … Read more
The export command is used in Linux/Unix to set environment variables, which are used to store values that can be referenced in various shell commands and scripts. To set an environment variable using export, simply type the following in your terminal: export VARNAME=value Replace VARNAME with the name of the environment variable, and value with … Read more
To show the version of Gnome on an Ubuntu Linux system, you can use the following command: gnome-shell –version This will display the version number of the Gnome shell, which is the graphical user interface component of the Gnome desktop environment. For example: GNOME Shell 3.38.2 Alternatively, you can also use the lsb_release command to … Read more
If the ifconfig command does not show the IPv4 address on your Linux system, there are several potential reasons for this: The network interface is down: Try running the following command to bring up the network interface: sudo ifconfig <interface> up Replace <interface> with the name of the network interface, for example eth0. The network … Read more
The semanage command is part of the SELinux management tools package, which is not installed by default on Red Hat Enterprise Linux (RHEL) 6/7/8 systems. To install it, you need to run the following command as root or with sudo privileges: yum install policycoreutils-python After the installation, you should be able to run the semanage … Read more
To change the OpenSSH port on Red Hat Enterprise Linux 6 (RHEL 6) with SELinux enabled, you need to perform the following steps: Edit the OpenSSH configuration file: sudo vi /etc/ssh/sshd_config Find the line that starts with Port and change it to the desired port number. In this case, you want to change it to … Read more
The error message “/usr/bin/ld: cannot find -lc” usually occurs when the linker is unable to find the standard C library libc.so while compiling a program. This can happen if the library is not installed on your system or if the linker is not able to find it in the default library search path. To resolve … Read more
The process for configuring a fingerprint reader on a ThinkPad, Dell, or Toshiba laptop running Ubuntu Linux can vary depending on the specific model of the laptop and the type of fingerprint reader it uses. In general, however, the following steps can be used as a guide to configure the fingerprint reader: Install the required … Read more
The TMOUT variable in Linux is used to automatically log out users after a specified period of time if they have been inactive. To set this variable, you can add the following line to your .bashrc file or a global shell configuration file: TMOUT=600 The value 600 specifies the number of seconds of inactivity after … Read more
In the vi or vim text editor, you can save the existing file to a new file (also known as “save as”) by using the following steps: Start vi or vim and open the file that you want to save as a new file. Enter :w to write (save) the file to disk. Enter :w … Read more