Essential Linux Commands(devops)

Here’s a list of 100 commonly used Linux commands that are frequently encountered in DevOps environments. These commands cover various aspects of system administration, file manipulation, networking, process management, and scripting, all of which are essential in DevOps workflows.

File and Directory Operations:

ls - List files and directories
cd - Change directory
pwd - Print working directory
mkdir - Create directories
rmdir - Remove empty directories
cp - Copy files and directories
mv - Move/rename files and directories
rm - Remove files and directories
touch - Create an empty file or update a file’s timestamp
cat - Concatenate and display file contents
less - View file contents one page at a time
more - Similar to less, but older
head - Show the first few lines of a file
tail - Show the last few lines of a file
find - Search for files and directories
locate - Find files by name using a database
du - Disk usage of files and directories
df - Disk space usage of file systems
tree - Display directory structure in a tree format
ln - Create hard and soft (symbolic) links

File Permissions and Ownership:

chmod - Change file permissions
chown - Change file owner and group
chgrp - Change group ownership of a file
umask - Set default file creation permissions
stat - Display file or filesystem status

Text Processing:

grep - Search text using patterns
sed - Stream editor for filtering and transforming text
awk - Text processing and data extraction language
cut - Remove sections from each line of files
sort - Sort lines of text files
uniq - Report or omit repeated lines
tr - Translate or delete characters
wc - Word, line, character count
diff - Compare the contents of two files
tee - Read from standard input and write to standard output and files
split - Split a file into pieces
paste - Merge lines of files
join - Join lines of two files on a common field

Compression and Archiving:

tar - Archive files
gzip - Compress files using GNU zip
gunzip - Decompress files compressed by gzip
zip - Compress files into an archive
unzip - Extract files from a ZIP archive
xz - Compress files with xz
bzip2 - Compress files with bzip2
7z - Compress files using 7-zip

Networking:

ping - Test network connectivity
curl - Transfer data from or to a server
wget - Download files from the web
ifconfig - Configure network interfaces (older)
ip - Display or manipulate routing, devices, and tunnels (newer)
netstat - Network statistics (use ss as modern replacement)
ss - Display network socket information
nslookup - Query Internet name servers interactively
dig - DNS lookup utility
traceroute - Trace the route packets take to a network host
scp - Securely copy files between hosts
rsync - Sync files between locations or hosts
ftp - File transfer protocol client
telnet - Simple text-based network protocol client
nmap - Network exploration and security auditing tool
hostname - Show or set the system’s hostname
route - Show or manipulate the IP routing table
ssh - Secure Shell to connect to remote machines
iptables - Firewall configuration tool
netcat (nc) - Network utility for reading from and writing to network connections

Process Management:

ps - Report current process status
top - Display active processes
htop - Interactive process viewer
kill - Terminate a process by PID
pkill - Kill processes by name
nice - Start a process with a given priority
renice - Change the priority of an existing process
jobs - List active jobs
bg - Resume a suspended job in the background
fg - Resume a suspended job in the foreground
nohup - Run a command immune to hangups
screen - Terminal multiplexer
tmux - Terminal multiplexer (more modern than screen)

System Information and Monitoring:

uname - Print system information
uptime - Show how long the system has been running
dmesg - Print or control the kernel ring buffer
free - Show free and used memory
vmstat - Report virtual memory statistics
iostat - CPU and I/O statistics
lsof - List open files
df - Report filesystem disk space usage
sar - Collect, report, or save system activity information
who - Show who is logged on
w - Show who is logged on and what they are doing

Disk and Partition Management:

fdisk - Partition table manipulator
mkfs - Create a filesystem on a device
mount - Mount a filesystem
umount - Unmount a filesystem
fsck - Check and repair a filesystem
blkid - Locate and display block device attributes
df - Show disk space usage
du - Estimate file space usage
lsblk - List information about block devices
parted - Manipulate disk partitions

Bonus DevOps-Specific Tools:

docker - Manage Docker containers
kubectl - Manage Kubernetes clusters
helm - Kubernetes package manager
terraform - Infrastructure as code tool for building, changing, and versioning infrastructure
ansible - Automation tool for configuration management and deployment
git - Version control system to track changes in source code

These are just starting points! DevOps workflows rely heavily on these Linux commands to manage infrastructure, automate processes, and troubleshoot systems.

Command Palette