The document provides syntax and descriptions for various Linux commands including bc, cal, cat, cd, cp, date, echo, grep, id, last, lastlog, ls, man, mkdir, mv, pwd, rm, rmdir, sort, shutdown, who, whois, more, less, clear, cmp, wc, whoami, head, and tail. It explains what each command is used for and provides the basic syntax.

2. The Syntax is

3. bc [options]

4. cal COMMAND:

5. cal command is used to display the calendar.

6. SYNTAX:

7. The Syntax is

8. cal [options] [month] [year]

10. cat linux command concatenates files and print it on the standard output.

11. SYNTAX:

12. The Syntax is

13. cat [OPTIONS] [FILE]...

14. cd COMMAND:

15. cd command is used to change the directory.

16. SYNTAX:

17. The Syntax is

18. cd [directory | ~ | ./ | ../ | - ]

19. cp COMMAND:

20. cp command copy files from one location to another. If the destination is an existing file, then the file is overwritten; if the destination is an existing directory, the file is copied into the directory (the directory is not overwritten).

21. SYNTAX:

22. The Syntax is

23. cp [OPTIONS]... SOURCE DEST

25. echo command prints the given input string to standard output.

26. SYNTAX:

27. The Syntax is

28. echo [options..] [string]

29. grep COMMAND:

30. grep command selects and prints the lines from a file which matches a given string or pattern.

31. SYNTAX:

32. The Syntax is

34. last command is used to display the last logged in users list. Last logged in users informations are read from the file /var/log/wtmp.

35. SYNTAX:

36. The Syntax is

37. last [options]

38. lastlog COMMAND:

39. lastlog command is used to print the last login times for system accounts. Login information is read from the file /var/log/lastlog.

40. SYNTAX:

41. The Syntax is

42. lastlog [options]

45. rm linux command is used to remove/delete the file from the directory.

46. SYNTAX:

47. The Syntax is

49. sort command is used to sort the lines in a text file.

50. SYNTAX:

51. The Syntax is

52. sort [options] filename

53. Shutdown COMMAND:

54. Shutdown - Turn off the computer immediately or at a specified time.

55. SYNTAX:

56. The Syntax is

57. /sbin/shutdown [-t sec] [-arkhncfFHP] time [warning-message]

60. less - Opposite of the more command

61. clear - Clears the terminal screen.

62. cmp file1 file2 - Compares two files, reporting all discrepancies. Similar to the diff command, though the output format differs.

63. wc filename --- tells you how many lines, words, and characters there are in a file

64. whoami --- returns your username. Sounds useless, but isn't. You may need to find out who it is who forgot to log out somewhere, and make sure *you* have logged out.