1	 alias and unalias
2	 arch
3	 arp - Done
4	 at - Done
5	 awk - Done
6	 bc - Done
7	 cal
8	 cat 
9	 cd
10	 chage
11	 chattr
12	 chgrp
13	 chmod
14	 chown
15	 cp
16	 cpio
17	 crontab
18	 curl
19	 cut - Done
20	 date
21	 dd
22	 df 
23	 diff
24	 dig
25	 dnf
26	 du
27	 expr
28	 fdisk
29	 file
30	 find
31	 firewall-cmd
32	 free
33	 ftp
34	 grep
35	 head
36	 history
37	 hostname
38	 id
39	 ifconfig
40	 iostat
41	 ip
42	 kill
43	 last
44	 less and more
45	 ln
46	 locate
47	 lpstat and lpadmin
48	 ls
49	 lsof
50	 lspci
51	 mail
52	 man
53	 mdadm
54	 mkdir and rmdir
55	 mkisofs
56	 mount
57	 mutt
58	 mv
59	 nano
60	 netstat
61	 nice, renice
62	 nslookup
63	 passwd
64	 pam_tally2
65	 paste
66	 ping
67	 perl one liner
68	 pkill
69	 ps
70	 pwd
71	 reboot, poweroff
72	 rm
73	 rpm
74	 rsync
75	 scp
76	 screen
77	 sed
78	 sort
79	 ss
80	 ssh
81	 sysctl
82	 tail
83	 tar
84	 tcpdump
85	 top
86	 touch
87	 tr
88	 traceroute
89	 umask
90	 uname
91	 uniq
92	 uptime
93	 useradd
94	 vi
95	 vmstat
96	 w, who
97	 watch
98	 wc
99	 wget
100	 ypcat
101	 yppasswd
102	 yum
103	 zip
104  sar