All time 101 linux commands

Below is 101 Linux commands. As soon as, I get some time I will add description with output of all commands. Please help me to add few more commands and let's touch 500 commands.

1. cat
2. useradd
3. vi
4. kibitz
5. tar
6. gzip
7. gunzip
8. grep
9. head
10. tail
11. more
12. less
13. chmod
14. chown
15. ifconfig
16. awk
17. sed
18. cut
19. service
20. tr
21. paste
22. diff
23. pipe |
24. date
25. cal
26. alias
27. set
28. export
29. touch
30. mount
31. uname
32. free
33. df
34. du
35. rpm
36. last
37. locate
38. find
39. ps
40. top
41. tcpdump
42. ls
43. logout
44. login
45. rlogin
46. telnet
47. ftp
48. history
49. cp
50. cmp
51. cksum
52. rm
53. mount
54. echo
55. uniq
56. sort
57. hostname
58. wget
59. rsync
60. cd
61. ssh
62. scp
63. bzip2
64. which
65. whereis
66. who am i
67. who
68. wc
69. type
70. traceroute
71. tee
72. su
73. sudo
74. split
75. pwd
76. ping
77. nsloopup
78. nice
79. mv
80. mkdir
81. man
82. info
83. init
84. setup
85. chkconfig
86. clear
87. crontab
88. dir
89. fdisk
90. dos2unix
91. expr
92. expand
93. mc
94. wall
95. watch
96. uptime
97. bc
98. ln
99. kudzu
100. kill
101. pkill