You can put a Linux laptop or netbook in hibernate or suspend mode by using the systemctl command. To put the system in hibernate mode, run the following command as root or with sudo: systemctl hibernate To put the system in suspend mode, run the following command as root or with sudo: systemctl suspend Note … Read more
The startx error message “Failed to load” in BackTrack 5 KDE is usually caused by a problem with the X Window System configuration. Here are a few solutions that you can try to resolve the issue: Check the X Window System configuration files: The X Window System configuration files are stored in the /etc/X11/ directory. … Read more
You can find the kernel version of a Red Hat Enterprise Linux 6 (RHEL 6) or CentOS 6 system by using the uname command with the -r option. The -r option displays the kernel release number. Here’s an example: uname -r This will output the kernel version number, for example: 2.6.32-754.18.2.el6.x86_64 In this example, 2.6.32-754.18.2.el6.x86_64 … Read more
In Bash, you can use the for loop to execute a set of commands a specified number of times. The “C-style” syntax of a for loop in Bash looks like this: for ((expression1; expression2; expression3)) do commands done Here’s what each expression does: expression1: initializes the loop counter. This is executed only once at the … Read more
If you’re encountering an “out of disk space” error while installing the package kernel-2.6.32-131.2.1.el6.x86_64 in Linux, it means that the /boot partition does not have enough free space to accommodate the new kernel image. This can be resolved by removing some old, unused kernel images from the /boot partition. Here’s how you can do this: … Read more
In Linux or Unix, you can use the ls command with the -l option to see the file size of a file or directory. The file size is listed in the fifth column of the output. For example: ls -l <file_name> Replace <file_name> with the name of the file you want to check the size … Read more
To find out the version number of a kernel module or device driver in Linux, you can use the following command: modinfo <module_name> Replace <module_name> with the name of the module for which you want to see the version number. For example, to find the version number of the “vmxnet3” module, you would run: modinfo … Read more
In Vim, you can open a file and go to a specific function or line number by using the following command: vim +[line number] [file name] For example, if you want to open a file named “example.txt” and go to line number 50, the command would be: vim +50 example.txt If you want to go … Read more
Verifying GPG keys is an important security measure to ensure that packages installed on your system are authentic and have not been tampered with. In Red Hat Enterprise Linux (RHEL), CentOS, and Fedora, you can verify the GPG key for a package update using the following steps: Import the GPG key for the package repository: … Read more
The “Warning: RPMDB altered outside of yum” message in RHEL (Red Hat Enterprise Linux) indicates that the RPM database, which is used by the yum package manager to keep track of installed packages, has been modified in a way that is not consistent with how yum updates it. This can happen if you manually install … Read more