How to see "Disk read total" and "Disk write total" statistics for processes in the terminal?

[HyperBear]

Screenshot from gnome-system-monitor.

Screenshot from 2025-06-17 17-32-37 nemo disk read total.png (8.89 KiB) Viewed 81 times

How to see this information from a command line?

iotop -o -a only measures the data accumulated since iotop was started.

-a, --accumulated
Show accumulated I/O instead of bandwidth. In this mode, iotop
shows the amount of I/O processes have done since iotop started.

gnome-system-monitor shows the amount of data since the process was started, even if gnome-system-monitor was started later.

[donalduck]

do you want to monitor only a specific process disk activity or all ?

this data is extracted from /proc/[pid]/io

Code: Select all

ps -e | grep [n]emo
   1624 ?        00:00:01 nemo-desktop
   5346 ?        00:00:39 nemo

Code: Select all

cat -v /proc/1624/io 
rchar: 6389608
wchar: 1591686
syscr: 5912
syscw: 9467
read_bytes: 30138368
write_bytes: 286720
cancelled_write_bytes: 0

cat -v /proc/5346/io 
rchar: 231429709
wchar: 108927321
syscr: 94594
syscw: 79764
read_bytes: 175763968
write_bytes: 31522816
cancelled_write_bytes: 122880

there are interresting command line utilities in sysstat package.