- ILUG-D - lists.fsci.in

1D1C - mkvmerge
by Dhanasekar 25 Aug '23

25 Aug '23

mkvmerge - Merge multimedia streams into a Matroska file To install mkvmerge $ sudo apt install mkvtoolnix mkvtoolnix-gui To merge multiple .mkv files $ mkvmerge -o output.mkv input1.mkv +input2.mkv +input3.mkv To increase verbosity $ mkvmerge -o --verbose output.mkv input1.mkv +input2.mkv +input3.mkv To suppress status output $ mkvmerge -o -q output.mkv input1.mkv +input2.mkv +input3.mkv To get help info $ mkvmerge --help regards, T.Dhanasekar

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1D1C - zip
by Dhanasekar 24 Aug '23

24 Aug '23

zip - package and compress (archive) files To install zip $ sudo apt install zip To zip a single file file1.txt $ zip file1.zip file1.txt To zip multiple files $ zip file.zip file1.txt file2.txt file3.txt file4.txt To zip files based on wildcard $ zip txt_file,zip *.txt $ zip mp3_file.zip *.mp3 $ zip jpg_file.zip *.jpg To zip a file to a different directory $ zip /path/to/dir/file.zip file1.txt file2.txt file3.txt To add a file to a existing zip file $ zip -u file.zip file5.txt To remove a file from an already existing zip file $ zip -d files.zip file5.txt To delete the original files after creating the zipped file $ zip -m file.zip file1.txt file2.txt file3.txt To zip directories $ zip -r mydir.zip dir1/ To set the level of compression compression ranges from 0 to 9 level default is 6 files with compression value 9 is less in file as compared to compression value 0 To compress a file using compression value 9 $ zip -9 files9.zip *.txt To compress a file using compression value 0 $ zip -0 file0.zip *.txt To create password-protected zip files $ zip -e files.zip *.txt To set a password to a zip file at any time $ zipcloak file.zip To display details about the zipped file $ zipdetails file.zip To search files inside the zip file file.zip the word ipaddress $ zipgrep ipaddress file.zip To display information about the zip file $ zipinfo file.zip To split the zip file $ zipsplit -n <size> test.zip <size> is the maximum size for the split files To get help info $ zip --help regards, T.Dhanasekar

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1D1C - htop
by Dhanasekar 23 Aug '23

23 Aug '23

htop - interactive process viewer To install htop $ sudo apt instal htop To display all linux processes $ htop To filter by CPU , MEM usage , PID $ htop press F6 UP/DOWN key to select the choice to filter To search for a process by name $ htop press F3 type process name regards, T.Dhanasekar

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1D1C - top
by Dhanasekar 22 Aug '23

22 Aug '23

top - display Linux processes To list all running linux processes $ top To show processes by specific user $ top -u <username> To display the running process in color $ top press z To display the absolute path of the running process $ top press c To set desired interval time to refresh top command $ top press d set from default time 3.0 to any value in seconds ex. Change delay from 3.0 to 5.0 To kill a running process without closing the top window $ top press k find the process to be killed and enter the pid value and enter To display all running processes by CPU utilization $ top press SHIFT+ P To change the priority of the process $ top press r give the pid of process where we need to change the priority then give priority value To list the load information of your CPU cores $ top press 1 To display the list of idle/sleeping processes $ top press i To print specific number of refresh outputs of top command $ top -n <value> $ top -n 5 $ top -n 3 regards, T.Dhanasekar

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1D1C - rpm
by Dhanasekar 21 Aug '23

21 Aug '23

rpm - it is a command-line utility for managing packages on Unix/Linux systems syntax $ sudo rpm [option] [package_name] To display full list of command $ sudo rpm --help To install RPM packages $ sudo rpm -ivh package_name To install RPM package from URL $ sudo rpm -ivh <package_URL> To upgrade a RPM package $ sudo rpm -Uvh <package_name> To remove RPM package $ sudo rpm -e <package_name> To delete an RPM package without removing dependencies $ sudo rpm -e --nodeps <package_name> To view package information of a installed package $ sudo rpm -qi <package_name> To view information about a package prior to installation $ sudo rpm -qip <package_name> To check the dependencies of packages prior to installing $ sudo rpm -qpR <package_name> To verify all installed packages $ sudo rpm -Va To verify a specific package $ sudo rpm -Vp <package_name> To display available documentation of an installed RPM package $ sudo rpm -qdf <package_name> To list all of the installed RPM packages $ sudo rpm -qa To view a list of all the recently installed packages $ sudo rpm -qa --last regards, T.Dhanasekar

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1D1C - clockdiff
by Dhanasekar 20 Aug '23

20 Aug '23

clockdiff - measure clock difference between hosts To check the time difference between two hosts 192.168.122.10 192.168.122.20 $ sudo clockdiff 192.168.122.10 192.168.122.20 To check the time difference between the local host and a remote host $ sudo clockdiff localhost ilugc.in regards, T.Dhanasekar

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1D1C - mtr
by Dhanasekar 19 Aug '23

19 Aug '23

mtr - a network diagnostic tool To display mtr output without options $ mtr google.com To display numeric IP addresses $ mtr -n google.com To display both host names as well as numeric IP numbers $ mtr -b google.com To limit the number of pings to a specific value $ mtr -c5 ilugc.in To set it into report mode $ mtr -r -c 4 ilugc.in > mtr-report To enable wide report mode $ mtr -rw -c 4 ilugc.in > mtr-report To change the interval between ICMP ECHO requests to a specified value $ mtr -i 3 ilugc.in To use TCP SYN packets or UDP datagrams $ mtr --tcp ilugc.in $ mtr --udp ilugc.in regards, T.Dhanasekar

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1D1C - faillock
by Dhanasekar 18 Aug '23

18 Aug '23

faillock - Tool for displaying and modifying the authentication failure record files To list ssh login failures of all users $ sudo faillock To list login failures of the specified user $ sudo faillock --user <username> To reset the failure records of the specified user $ sudo faillock --user <user_name> reset regards, T.Dhanasekar

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1D1C - bootctl
by Dhanasekar 17 Aug '23

17 Aug '23

bootctl - it check the EFI firmware and boot loader status, list and manage available boot loaders and boot loader entries, and install, update, or remove the systemd-boot(7) boot loader on the current system To display information about the system firmware and the bootloaders $ bootctl status To set a flag to boot into the system firmware on the next boot $ bootctl reboot-to-firmware true To display all available bootloader entries $ bootctl list To Install systemd-boot into the EFI system partition $ bootctl install To remove all installed versions of systemd-boot from the EFI system partition $ bootctl remove regards, T.Dhanasekar

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1D1C - nmtui
by Dhanasekar 16 Aug '23

16 Aug '23

nmtui - Text User Interface for controlling NetworkManager To open the user interface $ nmtui To display a list of available connections, with the option to activate or deactivate $ nmtui connect To set the system hostname $ nmtui <hostname> To edit/add/delete a given network $ nmtui edit name or $ nmtui edit id To connect to a given network $ nmtui connect name $ nmtui connect uuid $ nmtui connect device $ nmtui connect SSID regards, T.Dhanasekar

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