ps

Check running process

ps auxw | grep dockerd

Show PID process

ps e -ww -p2156

Show specific columns

ps axwwo pid,user,group,cmd --sort=command

ps show full process tree

ps -ef --forest

Kill name

pgrep -f vault | xargs kill

Process show most memory hungry

ps aux | awk '$11!~/\[*\]/ {print $6/1024" Mb --> "$11,$12,$13,$14}' | sort -g

Process show environment variables for a process

ps e -ww -p 28818

Show environment variables of process PID

strings /proc/<PID>/environ

Virtual memory

Virtual memory provides full address space to every process like it was the only process running on a machine with the size of RAM covering the whole address space.