100+ Linux commands and their explanation (bookmark this):
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1. cut - allows you to cut out sections of a specified file or piped data and print the result to standard output.
2. sort - used to sort files
3. uniq - used to extract uniq occurences
4. tr - utility for translating or deleting characters.
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5 grep - searches a file for a pattern of characters and displays all lines that match.
6. awk - a scripting language used for text processing.
7. sed - stream editor used to perform lots of functions on files, like searching, find and replace, insertion, or deletion.
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8. pstree - used to show running processes in a tree (data structure).
9. latest - displays a list of the most recently logged-in people.
10. w – display a list of the currently logged-in user sessions.
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11. free - use to get a detailed report on the system's memory usage.
12. scp - securely copy files or directories over ssh.
13. find - locates files using user-defined criteria.
14. ncdu - provides a useful and convenient way to view disk usage.
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15. ip - used to show or manipulate routing, devices, and tunnels.
16. ls - list the contents of a directory.
17. df - Displays the amount of disk space used.
18. du - display a list of all the files along with their respective sizes.
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19. diff - used to display differences in files by comparing line by line.
20. uptime – displays the system uptime as well as the load average.
21. top/btop++ – shows a real-time view of running processes in Linux.
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22. dstat - allows you to view all of your system resources instantly. All-in-one vmstat, iostat, netstat, and ifstat utility.
23. Iftop is a network traffic viewer.
24. nethogs - is a network traffic analyzer.
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26. vmstat - used to obtain information about memory, system processes, paging, interrupts, block I/O, disk, and CPU scheduling.
27. iotop - is an interactive I/O viewer. Get a snapshot of storage r/w activity.
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28. iostat - provides statistics on storage I/O.
29. netstat -used to show network statistics.
30. ss - ss command is a simpler and faster version of the now obsolete netstat command.
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31. atop – a tool for monitoring system resources in Linux.
32. ssh – secure protocol used as the primary means of connecting to Linux servers remotely.
33. sudo - run commands with administrative privileges. 34. cd – navigate between directories.
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35. touch – used to create, update a computer file or directory's access and modification dates.
36. man – used to read system reference manuals.
37. apropos – searches manual page names and descriptions for a user-supplied keyword.
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38. pwd – displays the current directory path.
39. cp - copy files and directories.
40. mv – move file or directories.
41. rm – deletes files and directories.
42. mkdir - create new directories.
43. rsync - remote file transfer and synchronization.
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44. tar - is an archive utility.
45. gzip - use for compression and decompression of files.
46. b2zip - a compression utility comparable to gzip. It employs a distinct compression algorithm.
47. zip – used for file packaging and compression (archiving).
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48. locate – in Linux, search for files.
49. ps – allows you to list the status of processes running on your system easily.
50. cron - execute scheduled tasks.
51. mtr - is a network diagnostic tool, a combination of ping and traceroute commands.
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52. nslookup - interactively query Internet name servers (NS).
53. host –used for DNS (Domain Name System) lookup operations.
54. dig – DNS lookup tool.
55. nmcli - sused to display network device status, create, edit, activate/deactivate, and delete network connections.
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56. ping - sends an ICMP ECHO REQUEST to network hosts. 57. traceroute - examine the path packets follow to reach a specific host.
58. wget - download files through HTTP, HTTPS, FTP, and FTPS.
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59. curl – data transport via several network protocols. (Can handle more protocols than wget)
60. dd - used to convert and copy files.
61. fdisk - Modify the disk partition table.
62. parted – used to create and manipulate partition tables.
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63. blkid - a command-line utility for finding and printing block device attributes.
64. mkfs - create a Linux file system.
65. fsck - an utility for determining the consistency of a file system.
66. nc - used for just about anything under the sun involving TCP or UDP.
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67. umask - returns, or sets, the value of the system's file mode creation mask.
68. chmod – alters the access rights of file system objects.
69. chown – alter the owner and group of a file.
70. chroot - used to change the root directory.
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71. useradd - create a new user or alter the default information for a new user.
72. userdel - used to delete a user account and all associated files.
73. usermod – used to edit or change any existing user account's properties.
74. vi is a text editor.
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75. cat – displays the contents of a file.
76. tac – reverse output file contents.
77. more - show file contents one screen/page at a time.
78. less – identical to more, but with more features
79. tail – used to show the last few lines of a text file or piped data.
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80. head - used to show the first few lines of a text file or piped data.
81. dmesg – displays the kernel ring's message buffer.
82. journalctl - Tused to view systemd, kernel and journal logs.
83. kill - terminates a process.
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84. killall - sends a kill signal to all instances of a specific process.
85. sleep – pauses program execution for a given amount of time.
86. wait – suspend script execution until all background jobs have been completed.
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87. nohup - short for no hang up is a command in Linux systems that keep processes running even after exiting the shell or terminal.
88. screen – keep a remote server session open. (It also functions as a full-screen window manager.)
89. tmux is a terminal multiplexer.
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90. passwd — Change the password of a user.
91. clear – clears the terminal's screen. 92. env - run a command in an altered environment
91. mount - used to mount the filesystem found on a device to big tree structure(Linux filesystem) rooted at '/'.
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92 - umount - unmounts a previously mounted device, directory, file, or file system.
93. systemctl - used to control and manage systemd and services.
94. alias - defines an alias for the specified command.
95. at - runs a specified script or command at a set later time.
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96. atq - shows jobs in the at utility queue.
97. atrm - deletes the specified job from the at utility queue.
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98. bash - uses the Bourne Again Shell command language to interpret commands from standard input or a file, or to launch a subshell.
99. bc - Performs calculations via its programming language.
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100. bash - uses the Bourne Again Shell command language to interpret commands from standard input or a file, or to launch a subshell.
101. bc - Performs calculations via its programming language.
102. chfn - changes the specified user account's current information.
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103. chgrp - changes the default group of the specified file or directory.
104. chmod - changes system security permissions for the specified file or directory
105. chown - changes the default owner of the specified file or directory.
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