- ILUG-D - lists.fsci.in

kubernetes community day 2023 slides
by Dhanasekar 27 Jul '23

27 Jul '23

Hi The kubernetes community days 2023 was held on July 22, 2023 at chennai. Speaker slides of all the talks are available on Github https://github.com/kcdchennai/kcdchennai/tree/main/2023/Speaker%20Slides%20… videos of the event will be shared on Youtube soon regards, T.Dhanasekar

1 0

1D1C - pinky
by Dhanasekar 27 Jul '23

27 Jul '23

Pinky - it prints the user information To display the information about the users $ pinky To produce the long format output $ pinky -l <username> To Omit Column Headings $ pinky -f To remove the name and where column $ pinky -i To remove the name, idle and where columns $ pinky -q regards, T.Dhanasekar

1 0

1D1C - machinectl
by Dhanasekar 26 Jul '23

26 Jul '23

machinectl - used to execute operations on VM machines and images To List running VMs and containers $ machinectl list To Show VM/container details $ machinectl status <vm_name> To Show properties of one or more VMs/containers $ machinectl show <vmname> To power off the vm $ machinectl poweroff <vm_name> regards, T.Dhanasekar

1 0

1D1C - lsscsi
by Dhanasekar 25 Jul '23

25 Jul '23

lsscsi - list SCSI devices (or hosts), list NVMe devices To list SCSi devices $ lsscsi To get classic output $ lsscsi -c To get the device name , device node major and minor numbers $ lsscsi -d To display scsi generic device file name $ lsscsi -g To list the SCSI hosts currently attached to the system $ lsscsi -H To display additional information in pairs $ lsscsi -L To display additional information for each SCSI device $ lsscsi -l regards, T.Dhanasekar

1 0

1D1C - eval
by Dhanasekar 24 Jul '23

24 Jul '23

eval - built-in shell command used to evaluate and execute strings as a shell command eval is to interpret and execute dynamic or complex commands stored in strings or variables syntax $ eval [arguments] To Store Command in a Variable $ var="free -h" $ eval "$var" To substitute command $ command="echo \$(uptime)" $ eval "$command" To generate and execute commands inside a loop dynamically $ vim newscript.sh #!/bin/bash for i in {1..10}; do eval "echo 'Loop iteration $i'" done :x save and exit run $ bash newscript.sh regards, T.Dhanasekar

1 0

1D1C - iotop
by Dhanasekar 23 Jul '23

23 Jul '23

iotop - it allows the user to monitor I/O usage in the disk To print the details of disk I/O usage $ sudo iotop To print processes that are actually doing disk I/O $ sudo iotop -o To print the output in non-interactive or batch mode $ sudo iotop -b To display disk I/O details of a particular process $ sudo iotop -p <pid> To set the number of iterations $ sudo iotop -n 5 $ sudo iotop -n 10 To display the output with timestamp $ sudo iotop -t To display only the I/O usage by user home $ sudo iotop -u To get details of processes $ sudo iotop -P To display without header lines $ sudo iotop -q To display disk IO usage in KB $ sudo iotop -k regards, T.Dhanasekar

1 0

1D1C - locate
by Dhanasekar 22 Jul '23

22 Jul '23

locate - find files by name, quickly To search for a file $ locate <file_name> $ locate sample.pdf $ locate sample.txt To search and show only the existing files in the system $ locate -e <file_name> To print the number of matched files $ locate -c <file_name> To limit the number of search $ locate *.txt -n 15 To Ignore case sensitive files $ locate -i test_file regards, T.Dhanasekar

1 0

1D1C - iostat
by Dhanasekar 20 Jul '23

20 Jul '23

iostat - Report CPU statistics and i/o statistics for devices and partitions To display report for all CPU and devices $ iostat To display the CPU utilization report $ iostat -c To display continuous CPU utilization report at specific seconds interval $ iostat -c 5 $ iostat -c 10 To display the device utilization report $ iostat -d To display specific device utilization reports at specific second intervals $ iostat -d 5 5 $ iostat -d 3 10 To display the registered device mapper names $ iostat -N To display the report in human-readable format $ iostat -h To view the extended statistics $ iostat -x To display the timestamp for each report $ iostat -t To display statistics for a specific device and its partitions $ iostat -p sda $ iostat -p vda To display statistics for all the block devices and partitions $ iostat -p ALL To display statistics for a group of devices $ iostat -g docker $ iostat -g kvm $ iostat -g sudo To print output in JSON format $ iostat -c -o JSON regards, T.Dhanasekar

1 0

1D1C - lsipc
by Dhanasekar 19 Jul '23

19 Jul '23

lsipc - show information on IPC facilities currently employed in the system To print output without options $ lsipc To view the information about shared memory $ lsipc --shmem To print output in json format $ lsipc -J $ lsipc --json -o resource,limit,used To display specific columns $ lsipc --shmem -o KEY,SIZE,PERMS To display help options $ lsipc -h regards, T.Dhanasekar

1 0

1D1C - lnstat
by Dhanasekar 18 Jul '23

18 Jul '23

lnstat - unified linux network statistics To view the unified network statistics $ sudo lnstat To print the number of intervals $ sudo lnstat -c 15 To dump list of available files/keys $ sudo lnstat -d To set the interval to specified seconds $ sudo lnstat -i 20 To specify the width for every field $ sudo lnstat --width 3,3,3 To print help options $ sudo lnstat -h $ To print output in JSON format $ sudo lnstat -j To display statistics files supported by the command $ sudo lnstat -d regards, T.Dhanasekar

1 0

2025

2024

2023

2022

2021

ILUG-D