bash useful

RAM

clean RAM buff/cache

echo 3 > /proc/sys/vm/drop_caches

check ram usage for 24 hours w/o monitoring

 for i in {1..17280}; do echo -e "`date` \n `ps_mem`\n\n" >> /opt/ram_log.txt; sleep 5; done

PS commands

Show processes in a hierarchy

ps -ae --forest

Show threads

ps -L PID

dynamic mode

watch -n 2 'ps -ef | grep [f]irefox'

Get info abount ssd/hhd

lshw -class disk
apt install hwinfo -y
hwinfo --disk