ILUG-D April 2023

ilugd@lists.linuxdelhi.org

6 participants
33 discussions

1D1C - timedatectl
by Dhanasekar 03 Apr '23

03 Apr '23

timedatectl - Control the system time and date To display the current settings $ timedatectl To Show current time settings $ timedatectl status To Show properties of systemd-timedated $ timedatectl show To change settings $ sudo timedatectl set-timezone Asia/Hong_Kong $ sudo timedatectl set-timezone Asia/Tokyo To list the time zones $ timedatectl list-timezones | column To display the number of time-zones available $ timedatectl list-timezones | wc -l To Show status of systemd-timesyncd $ timedatectl timesync-status To Show properties of systemd-timesyncd $ timedatectl show-timesync To Show all properties, including empty ones $ timedatectl -a To Set system time $ timedatectl set-time <TIME> To Set system time zone $ timedatectl set-timezone <ZONE> To Show this help options $ timedatectl --help regards, T.Dhanasekar

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1D1C - tgz
by Dhanasekar 02 Apr '23

02 Apr '23

tgz - makes a gzip'd tar archive syntax $ tgz [ destination [ source ... ] ] $ tar -cvzf <name of tarball>.tgz /path/to/source/folder $ tar -cvzf <name of tarball>.tgz /path/to/source_file $ tar -cvzf file.tgz /home/ilugc/Documents/file.pdf regards, T.Dhanasekar

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1D1C - time
by Dhanasekar 02 Apr '23

02 Apr '23

time - run programs and summarize system resource usage syntax $ time [options] [command] Real: This is the actual time taken by the processor of the computer to execute the command from pressing the button to complete the command. User: CPU time that is taken by the user mode. SYS: This is the time taken by the system or the Kernel to execute the command. To calculate execution time of commands $ time sleep 5 $ time free -h $ time df -Th $ time ping google.com To display the time in portable POSIX format $ time -p sleep 5 $ time -p free -h $ time -p df -Th $ time -p ping google.com To calculate the update time $ time sudo apt update To save the time command output in the text file $ /usr/bin/time -o sleep_output.txt sleep 5 $ /usr/bin/time -o df_output.txt df -Th To get detailed summary of the executed time $ /usr/bin/time -v sleep 5 $ /usr/bin/time -v df -Th $ /usr/bin/time -v free -h regards, T.Dhanasekar

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ILUG-D April 2023