1. htop
-
Usage: Interactive process viewer that’s much more advanced than
top. -
Command:
htop - Description: Shows processes, memory, and CPU usage in a user-friendly, color-coded layout.
2. nmap
- Usage: Network mapping and discovery.
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Command:
nmap -sP 192.168.1.0/24 - Description: Scans a network range to identify active devices.
3. rsync
- Usage: Syncs directories and files locally or across networked systems.
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Command:
rsync -av /source /destination - Description: Great for backups and maintaining directories across systems.
4. tmux
- Usage: Terminal multiplexer allowing multiple sessions.
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Command:
tmux - Description: Enables you to switch between several programs in a single terminal.
5. awk
- Usage: Text processing and data extraction from files.
-
Command:
awk '{print $1}' file.txt - Description: Powerful for extracting and formatting text data.
6. dig
- Usage: DNS lookup tool.
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Command:
dig example.com - Description: Provides DNS information for domain troubleshooting.
7. tcpdump
- Usage: Packet sniffer for network troubleshooting.
-
Command:
sudo tcpdump -i eth0 - Description: Allows monitoring of incoming and outgoing packets.
8. lsof
- Usage: Lists open files and the processes using them.
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Command:
lsof -i :80 - Description: Essential for diagnosing file locks and network usage.
9. jq
- Usage: Processes JSON data.
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Command:
cat file.json | jq '.' - Description: Parses and formats JSON data from files or APIs.
10. iftop
- Usage: Monitors bandwidth usage per IP.
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Command:
sudo iftop - Description: Real-time network traffic monitoring by IP address.
11. strace
- Usage: Traces system calls and signals.
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Command:
strace -p <PID> - Description: Useful for debugging by tracing system calls from a process.
12. ip a
- Usage: Displays network interfaces and IP address configuration.
-
Command:
ip a - Description: Essential for managing network settings on modern Linux systems.
13. grep -r
- Usage: Searches text within files recursively.
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Command:
grep -r 'search-term' /path/to/directory - Description: Locates specific text across directories, useful for log analysis.
14. iostat
- Usage: Monitors CPU and I/O statistics.
-
Command:
iostat -x 1 - Description: Helps in understanding disk and CPU usage patterns over time.
15. iptables
- Usage: Configures firewall rules.
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Command:
sudo iptables -L - Description: Manages network traffic control for security purposes.
16. nc (Netcat)
- Usage: Network utility for debugging and testing.
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Command:
nc - Description: Versatile for creating connections, debugging, and port scanning.
17. sar
- Usage: Collects, reports, and saves system activity information.
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Command:
sar -u 1 5 - Description: Monitors performance metrics, including CPU, memory, and network.
18. atop
- Usage: Monitors system performance.
-
Command:
atop - Description: Provides a detailed look at processes, memory, disk, and network.
19. watch
- Usage: Repeats a command at fixed intervals.
-
Command:
watch -n 1 df -h - Description: Useful for monitoring outputs in real-time, such as disk usage.
Do check: https://linktr.ee/DevOps_Descent
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