Linux and DevOps Cheat Sheets

Use traceroute command to trace the route from a switch to a host device and helps in troubleshooting network unreachable issues by identifying the network hops

The rmmod command in Linux is used to remove a module from the linux kernel.

Use stress command to increase load on CPU, Memory, Disk and Disk I/O with examples.

The syntax for screen command is as follows:

The simplest way to sort files in Linux is to sort them alphabetically by name. This is done using the ls command with the -l option and piping it to the sort

In this tutorial I have shared the most used tmux cheatsheet with the list of commands and shortcuts for sessions, windows panes etc in tmux

virt-install examples to create KVM Virtual Machine in Linux. virt-install cheatsheet with virsh to manage the VM. Use location, PXE, custom disks, network with virt-install

Use sysctl -p FILE or sysctl --load FILE or sysctl --system to perform sysctl reload without reboot. Update the initramfs using dracut -f or update-initramfs command

Use ss command to examine the sockets in Linux. It is an excellent network troubleshooting tool, successor of netstat command. Check active connections with different state such as established, listening, time_wait, …

use vmstat command in linux to monitor CPU, memory, disk IO and many more resources dynamically run time.

The vgcreate command in Linux is used to create a volume group. The best part of using volume groups to create partitions is that you can runtime increase or decrease the storage pool to add more partitions. You can also …

yum command in linux is a package manager used with CentOS, RHEL, Rocky, Fedora distribution. It is used to install, update, upgrade, remove or modify packages

How to zip a folder in Linux. How to create a zip file in Linux and Unix. Zip command examples and cheatsheet. Linux zip directory. Linux unzip to directory.

Here I have consolidated 29 linux interview questions and answers for experienced professionals working into Linux or System Administrator profile.

nice and renice command syntax and examples explained in Linux. Use nice command to start a process with defined priority. Use renice command to change the priority of existing process

usermod command examples in Linux and Unix to modify the attributes of existing users. Change user's primary or secondary groups, home directory, login shell etc with usermod command

Multiple examples for useradd command in linux. Create users in Linux and Unix using useradd command.

Multiple one liners SFTP commands example to copy file from remote server to local machine windows and vice versa. sftp get command examples, usage syntax

Real time sync directories, delete files, exclude files from directory sync using lsyncd with rsync and rsyncssh in RHEL/CentOS 7/8 Linux with examples.

rsync command in Linux is used to transfer files and directories between one or more remote hosts. rsync is considered better than scp as it provides vast options.

Step by step instructions to shrink logical volume using lvreduce command with examples. You can shrink root or non -root logical volume

15+ lsof command examples cheat sheet to list the open files across file systems. List open TCP connections for IPv4 and IPv6 communication.

pvcreate command initializes a disk or partition as a physical volume. The physical volumes are used to create a volume group and the LVM logical volumes are

Learn how to use the grep command in Linux with practical examples. This guide explains common grep options such as recursive search, counting matches, matching whole words, printing line numbers, searching multiple …

Step by step instructions to rename logical volume i.e. both root and non- root. Update fstab, grub2 and generate initramfs to make sure the server reboots properly after renaming.

File compression is a process in which the file or group of files is compressed into a single archive file to reduce the size. It is used to store or share

The syntax for xz command is as follows:

In this tutorial we explore lvdisplay command which is used to display the logical volume status and many other details such as name, UUID, status, size etc

rpm command in Linux is used to manage packages. Install, upgrade and remove packages with or without dependencies. Verify rpm packages

Use scp command in linux to transfer files securely from one host to one or more remote hosts in Linux. Tutorial Cheat sheet to use scp command