ps --ppid 2 -p 2 --deselect

ps axl | awk '$7 != 0 && $10 !~ "Z"'

ps -e -o pid= -o state= -o vsize= | awk '$2 != "Z" && $3 != 0 {print $1}'

ps /proc/[0-9]*/exe(^-@:h:t)

ps -p "$(find -L /proc/[0-9]*/exe ! -type l | cut -d / -f3 | paste -sd , -)"

ps -p "$(
  { find -L /proc/[0-9]*/exe ! -type l | cut -d / -f3
    ps -eo pid=,state= | sed -n 's/ Z//p'
  } | paste -sd , -)"

ps auxf | grep -v ]$

ps -o pid,user,comm,vsz,stat | awk '$4 != 0 && $5 !~ "Z"'

$ ps -o foo
ps: bad -o argument 'foo', supported arguments: user,group,comm,args,pid,ppid,pgid,tty,vsz,stat,rss

ps aux | awk '{p[($5 == 0)]++} END {printf "%-16s %6dn%-16s %6dn", "Kernel processes", p[1], "User processes", p[0]}'

Kernel processes    354
User processes       59

ps aux | awk '$NF!~/^[.+]$/'