Awk/Unix group by

Question

have this text file:

name, age
joe,42
jim,20
bob,15
mike,24
mike,15
mike,54
bob,21

Trying to get this (count):

joe 1
jim 1
         


        

Answer 1

I come up with two functions based on the answers here:

topcpu() {
    top -b -n1                                                                                  \
        | tail -n +8                                                                            \
        | awk '{ print $12, $9, $10 }'                                                          \
        | awk '{ CPU[$1] += $2; MEM[$1] += $3 } END { for (k in CPU) print k, CPU[k], MEM[k] }' \
        | sort -k3 -n                                                                           \
        | tail -n 10                                                                            \
        | column -t                                                                             \
        | tac
}

topmem() {
    top -b -n1                                                                                  \
        | tail -n +8                                                                            \
        | awk '{ print $12, $9, $10 }'                                                          \
        | awk '{ CPU[$1] += $2; MEM[$1] += $3 } END { for (k in CPU) print k, CPU[k], MEM[k] }' \
        | sort -k2 -n                                                                           \
        | tail -n 10                                                                            \
        | column -t                                                                             \
        | tac
}

$ topcpu
chrome           0    75.6
gnome-shell      6.2  7
mysqld           0    4.2
zsh              0    2.2
deluge-gtk       0    2.1
Xorg             0    1.6
scrcpy           0    1.6
gnome-session-b  0    0.8
systemd-journal  0    0.7
ibus-x11         6.2  0.7

$ topmem
top              12.5  0
Xorg             6.2   1.6
ibus-x11         6.2   0.7
gnome-shell      6.2   7
chrome           6.2   74.6
adb              6.2   0.1
zsh              0     2.2
xdg-permission-  0     0.2
xdg-document-po  0     0.1
xdg-desktop-por  0     0.4

enjoy!