To install and use the nmon tool for monitoring Linux system performance, follow these steps: Install the nmon tool: On Debian/Ubuntu based systems: sudo apt-get update sudo apt-get install nmon On Red Hat/CentOS based systems: sudo yum install nmon Run the nmon tool: nmon Use the nmon tool: Use the “h” key to see a … Read more

The set and setenv commands in tcsh and csh shells are used to set environment variables, but with some differences: Syntax: The syntax for the set and setenv commands is different. set uses the following syntax: set variable = value while setenv uses the following syntax: setenv variable value Scoping: set sets a shell variable, … Read more

The grep command in Unix and Linux can be used to search for text between two words in a file. The grep command can be used with the -o option to extract only the matching text and with the -P option to enable Perl-compatible regular expressions (PCRE) mode, which allows for more advanced pattern matching. … Read more

Telnet access is not enabled by default on the Netgear DGND3700 N600 wireless router. To enable Telnet access, you’ll need to access the router’s web interface and make changes to the router’s settings. Here’s how: Connect your computer to the Netgear DGND3700 N600 router. Open a web browser and enter the router’s IP address, 192.168.0.1, … Read more

The lftp command line FTP client provides the ability to exclude files that match a certain pattern when performing a mirror operation. You can use a regular expression (regex) to specify the pattern of files to exclude. For example, to mirror a remote directory to a local directory while excluding all files with the extension … Read more

In a Bash shell, you can repeat the last command with a substitution using the !! command, followed by the :gs operator and the substitution expression. For example, if you want to repeat the last command, replacing the word “old” with “new”, you can run the following command: !!:gs/old/new The !! command repeats the last … Read more

To find out what’s using up all virtual memory in a Linux system, you can use the top or htop command. top provides an overview of system processes and system resource usage, including virtual memory usage. By default, top sorts processes by CPU usage, but you can sort by memory usage by pressing the M … Read more

To find the number of CPU cores in a Linux system, you can use the nproc command. Simply run the following command in the terminal: nproc This will return the number of processing units available on the system. Another alternative is to use the lscpu command which provides detailed information about the system’s CPU architecture: … Read more

To install libdvdcss2 on Debian Linux 6, you can follow these steps: Add the VideoLAN repository to your sources list: echo “deb http://download.videolan.org/pub/debian/stable/ /” | sudo tee -a /etc/apt/sources.list Download and install the VideoLAN repository key: wget -O – http://download.videolan.org/pub/debian/videolan-apt.asc | sudo apt-key add – Update your package list: sudo apt-get update Install libdvdcss2: sudo … Read more

Here’s an overview of the steps to install and configure Shoreline Firewall (Shorewall) on Debian or Ubuntu Linux: Install Shorewall:   sudo apt-get update sudo apt-get install shorewall Configure the network interfaces: Create a file “/etc/network/interfaces” with the following content, replacing “eth0” and “eth1” with your actual interface names:   auto lo iface lo inet … Read more