[bash] Lista comandi più utilizzati

vogy@eve:~$ history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head
78 clear
68 exit
51 ls
46 su
36 gcc
34 echo
34 cd
32 perl
30 man
29 sudo

vogy@eve:~$ history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head -4
82 clear
63 exit
52 ls                    <--- 52 volte
43 su
vogy@eve:~$ mkdir fuffa
vogy@eve:~$ ls fuffa     <--- +1
vogy@eve:~$ history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head -4
81 clear
63 exit
53 ls                    <--- 53
43 su
vogy@eve:~$ ls fuffa
vogy@eve:~$ ls fuffa
vogy@eve:~$ ls fuffa     <--- +3 = 56?
vogy@eve:~$ history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head -4
81 clear
63 exit
54 ls                    <--- 54
43 su

vogy@eve:~$ history | grep nano | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head
12 nano
4 sudo
1 man
1 history