To check the speed and specification of the RAM memory chips on an Ubuntu system, you can use the dmidecode command. The dmidecode tool provides access to the system’s DMI (Desktop Management Interface) table, which contains information about the system’s hardware components, including the RAM. Here’s an example of how to check the speed and … Read more

To sleep or delay a specified amount of time in a bash script, you can use the sleep command. This command takes the number of seconds to wait as an argument. For example, to sleep for 5 seconds: #!/bin/bash # Sleep for 5 seconds sleep 5 In some cases, you might need to sleep for … Read more

To extract audio from a video file and convert it to an MP3 format in Linux, you can use a tool like FFmpeg. Here’s an example command that will convert a video file named “video.mp4” to an MP3 file named “audio.mp3”: ffmpeg -i video.mp4 -vn -acodec libmp3lame -ac 2 -ab 160k -ar 48000 audio.mp3 The … Read more

To copy a file that has a colon (:) in its name using scp or rsync, you need to escape the colon with a backslash (\). For example, if you want to copy a file named file:1 from a remote host example.com to the current directory on your local machine, you would run: scp user@example.com:file\:1 … Read more

To find out if an IP address is banned in Linux using iptables, you can use the following command: iptables -nL –line-numbers | grep <IP address> This will show you the list of rules in the iptables firewall and highlight the line containing the specified IP address. If the IP address is banned, you should … Read more

To find out the CPU information on CentOS 7.x/8.x/Stream, you can use the following commands: lscpu: This command provides detailed information about the CPU architecture and the number of processors, cores, and threads. $ lscpu cat /proc/cpuinfo: This command displays information about the individual processors, including their clock speed, cache size, and architecture. $ cat … Read more

If you want to extract digits from a string in bash, you can use the following methods: Using grep: string=”abc123def456″ digits=$(echo $string | grep -o ‘[0-9]\+’) echo $digits Output: 123456 Using sed: string=”abc123def456″ digits=$(echo $string | sed ‘s/[^0-9]*//g’) echo $digits Output: 123456 Using awk: string=”abc123def456″ digits=$(echo $string | awk ‘/[0-9]+/{ gsub(/[^0-9]+/, “”, $0); print $0 … Read more

To disable or remove all NFS services on Debian/Ubuntu Linux, you can use the following steps: Stop the NFS server service: sudo service nfs-kernel-server stop Disable the NFS server service from starting automatically during boot: sudo update-rc.d nfs-kernel-server disable Uninstall the NFS server packages: sudo apt-get remove nfs-kernel-server Repeat the above steps for any other … Read more

To show lines in the vi or vim text editor, you can enable line numbers by using the following command: :set number This will display line numbers in the editor, and you can turn off line numbers by using the following command: :set nonumber Alternatively, you can enable line numbers when launching vi or vim … Read more

The easiest way to generate a random password in Linux is to use the “openssl” command. The following command will generate a 12-character random password: openssl rand -base64 12 This generates a random string of 12 characters that is base64-encoded, which gives you a set of characters that are safe to use in a password. … Read more