{"id":796,"date":"2024-12-04T06:40:27","date_gmt":"2024-12-04T06:40:27","guid":{"rendered":"https:\/\/www.xopsschool.com\/tutorials\/?p=796"},"modified":"2024-12-04T06:40:27","modified_gmt":"2024-12-04T06:40:27","slug":"top-linux-commands-for-administrator","status":"publish","type":"post","link":"https:\/\/www.xopsschool.com\/tutorials\/top-linux-commands-for-administrator\/","title":{"rendered":"Top Linux Commands for Administrator"},"content":{"rendered":"\n

1. less<\/code> –<\/strong> View file contents one page at a time.<\/p>\n\n\n\n

less filename.txt\r\n<\/code><\/pre>\n\n\n\n
2. grep –<\/strong> Search text in files.<\/p>\n\n\n\n
grep \"pattern\" file.txt\r\ngrep -r \"error\" \/var\/log    # Recursive search in \/var\/log\r\n<\/code><\/pre>\n\n\n\n
3. diff – <\/strong>Compare two files line by line.<\/p>\n\n\n\n
diff file1 file2<\/code><\/pre>\n\n\n\n
4. cmp – <\/strong>Compare two files byte by byte.<\/p>\n\n\n\n
cmp file1 file2<\/code><\/pre>\n\n\n\n
5. wc – <\/strong>Count lines, words, and characters in a file.<\/p>\n\n\n\n
wc file.txt\nwc -l file.txt<\/code><\/pre>\n\n\n\n
6. find –<\/strong> Search for files and directories.<\/p>\n\n\n\n
find \/home -name \"file.txt\"   \r\nfind \/var -size +100M          \r\n<\/code><\/pre>\n\n\n\n
7. zip and gzip –<\/strong> Compress files <\/p>\n\n\n\n
8. unzipand gunzip – <\/strong>Decompress files<\/p>\n\n\n\n
9. tar – <\/strong>Archive files<\/p>\n\n\n\n
10. who – <\/strong>Show logged-in users.<\/p>\n\n\n\n
who<\/code><\/pre>\n\n\n\n
11. whoami –<\/strong> Display current user.<\/p>\n\n\n\n
whoami<\/code><\/pre>\n\n\n\n
12. id –<\/strong> Show user ID (UID) and group ID (GID).<\/p>\n\n\n\n
id<\/code><\/pre>\n\n\n\n
13. adduser – <\/strong>Add a new user.<\/p>\n\n\n\n
sudo adduser username\r\n<\/code><\/pre>\n\n\n\n
14. passwd –<\/strong> Change user password.<\/p>\n\n\n\n
passwd username\r\n<\/code><\/pre>\n\n\n\n
15. usermod –<\/strong> Modify user accounts.<\/p>\n\n\n\n
sudo usermod -aG sudo username <\/code><\/pre>\n\n\n\n
16. deluser –<\/strong> Delete a user.<\/p>\n\n\n\n
sudo deluser username\r\n<\/code><\/pre>\n\n\n\n
17. groups – <\/strong>Display groups a user belongs to.<\/p>\n\n\n\n
groups username\r\n<\/code><\/pre>\n\n\n\n
18. su –<\/strong> Switch user accounts.<\/p>\n\n\n\n
su - username\r\n<\/code><\/pre>\n\n\n\n
19. sudo –<\/strong> Execute commands as another user.<\/p>\n\n\n\n
sudo command\r\n<\/code><\/pre>\n\n\n\n
20. top – <\/strong>Display dynamic process information.<\/p>\n\n\n\n
top<\/code><\/pre>\n\n\n\n
21. ps – <\/strong>Display running processes.<\/p>\n\n\n\n
ps aux <\/code><\/pre>\n\n\n\n
22. htop – <\/strong>Interactive process viewer (install required).<\/p>\n\n\n\n
htop\r\n<\/code><\/pre>\n\n\n\n
23. kill –<\/strong> Terminate a process.<\/p>\n\n\n\n
kill PID  <\/code><\/pre>\n\n\n\n
24. killall –<\/strong> Kill all processes by name.<\/p>\n\n\n\n
killall processname\r\n<\/code><\/pre>\n\n\n\n
25. pkill – <\/strong>Kill processes by name or attribute.<\/p>\n\n\n\n
pkill -u username <\/code><\/pre>\n\n\n\n
26. bg – <\/strong>Resume a background process.<\/p>\n\n\n\n
bg %1 <\/code><\/pre>\n\n\n\n
27. fg – <\/strong>Bring a background process to the foreground.<\/p>\n\n\n\n
fg %1<\/code><\/pre>\n\n\n\n
28. nice and renice –<\/strong> Set process priority.<\/p>\n\n\n\n
nice -n 10 command    \nrenice 5 PID <\/code><\/pre>\n\n\n\n
29. apt-get<\/code> –<\/strong> Install, remove, and manage packages (Debian-based systems)<\/p>\n\n\n\n
30. yum –<\/strong> Install, remove, and manage packages (RPM-based systems)<\/p>\n\n\n\n
31. rpm –<\/strong> Manage RPM packages<\/p>\n\n\n\n
32. apt-cache – <\/strong>Search package cache<\/p>\n\n\n\n
33. apt-key –<\/strong> Manage apt keys<\/p>\n\n\n\n
34. aptitute –<\/strong> Advanced package management tool<\/p>\n\n\n\n
35. apt-get update<\/code> –<\/strong> Update package list<\/p>\n\n\n\n
36. apt-get upgrade<\/code> –<\/strong> Upgrade installed packages<\/p>\n\n\n\n
37. apt-get install<\/code> –<\/strong> Install packages<\/p>\n\n\n\n
38. apt-get remove<\/code> – <\/strong>Remove packages<\/p>\n\n\n\n
39. history –<\/strong> Display command history<\/p>\n\n\n\n
40. man –<\/strong> Display manual pages<\/p>\n\n\n\n
41. nohup<\/code> –<\/strong> Run command immune to hangups<\/p>\n\n\n\n
42. screen –<\/strong> Create multiple terminal sessions<\/p>\n\n\n\n
43. tmux<\/code> – <\/strong>Terminal multiplexer<\/p>\n\n\n\n
44. lsof<\/code> – <\/strong>List open files<\/p>\n\n\n\n
45. strace<\/code> – <\/strong>Trace system calls<\/p>\n\n\n\n
46. itrace<\/code> – <\/strong>Trace library calls<\/p>\n\n\n\n
47. dd –<\/strong> Copy a file<\/p>\n\n\n\n
48. fdisk –<\/strong> Disk partitioning tool.<\/p>\n\n\n\n
49. parted –<\/strong> Disk partitioning tool.<\/p>\n\n\n\n
50. time –<\/strong> Measure time taken by a command.<\/p>\n","protected":false},"excerpt":{"rendered":"
1. less – View file contents one page at a time. 2. grep – Search text in files. 3. diff – Compare two files line by line. 4. cmp – Compare two files byte by byte. 5. wc – Count lines, words, and characters in a file. 6. find – Search for files and directories. … Read more<\/a><\/p>\n","protected":false},"author":200020,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-796","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nTop Linux Commands for Administrator - XOps Tutorials!!!<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.xopsschool.com\/tutorials\/top-linux-commands-for-administrator\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Top Linux Commands for Administrator - XOps Tutorials!!!\" \/>\n<meta property=\"og:description\" content=\"1. less – View file contents one page at a time. 2. grep – Search text in files. 3. diff – Compare two files line by line. 4. cmp – Compare two files byte by byte. 5. wc – Count lines, words, and characters in a file. 6. find – Search for files and directories. ... 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