1. ip – from Iproute2, a collection of utilities for controlling TCP/IP networking and traffic control in Linux.
2. ls – list directory contents.
3. df – display disk space usage.
4. du – estimate file space usage.
5. free – display memory usage.
6. scp – securely Copy Files Using SCP, with examples.
7. find – locates files based on some user-specified criteria.
8. ncdu – a disk utility for Unix systems.
9. pstree – display a tree of processes.
10. last – show a listing of last logged-in users.
11. w – show a list of currently logged-in user sessions.
12. grep – Search a file for a pattern of characters, then display all matching lines. 13. uptime – shows system uptime and load average.
14. top – shows an overall system view.
15. vmstat – shows system memory, processes, interrupts, paging, block I/O, and CPU info.
16. htop – interactive process viewer and manager.
17. dstat – view processes, memory, paging, I/O, CPU, etc., in real-time. All-in-one for vmstat, iostat, netstat, and ifstat.
18. iftop – network traffic viewer.
19. nethogs – network traffic analyzer.
20. iotop – interactive I/O viewer. Get an overview of storage r/w activity.
21. iostat – for storage I/O statistics.
22. netstat – for network statistics.
23. ss – utility to investigate sockets.
24. atop – For Linux server performance analysis.
25. Glances and nmon – htop and top Alternatives:
26. ssh – secure command-line access to remote Linux systems.
27. sudo – execute commands with administrative privilege.
28. cd – directory navigation.
29. pwd – shows your current directory location.
30. cp – copying files and folders.
31. mv – moving files and folders.
32. rm – removing files and folders.
33. mkdir – create or make new directories.
34. touch – used to update the access date and/or modification date of a computer file or directory.
35. man – for reading system reference manuals.
36. apropos – Search man page names and descriptions. 37. rsync – remote file transfers and syncing.
38. tar – an archiving utility.
39. gzip – file compression and decompression.
40. b2zip – similar to gzip. It uses a different compression algorithm.
41. zip – for packaging and compressing (to archive) files.
42. locate – search files in Linux.
43. ps – information about the currently running processes.
44. Making use of Bash scripts. Example: ./bashscript.sh
45. cron – set up scheduled tasks to run.
46. nmcli – network management.
47. ping – send ICMP ECHO_REQUEST to network hosts.
48. traceroute – check the route packets take to a specified host.
49. mtr – network diagnostic tool.
50. nslookup – query Internet name servers (NS) interactively.
51. host – perform DNS lookups in Linux.

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