set -x
eog&
pid=!$&
sleep 2&&
killall $pid
+ sleep 2
+ eog
+ pid='!$'
setting window size: 845/710
+ killall
usage: killall [ OPTIONS ] [ -- ] name ...
       killall -l, --list
       killall -V --version

  -e,--exact          require exact match for very long names
  -I,--ignore-case    case insensitive process name match
  -g,--process-group  kill process group instead of process
  -i,--interactive    ask for confirmation before killing
  -l,--list           list all known signal names
  -q,--quiet          don't print complaints
  -s,--signal         send signal instead of SIGTERM
  -v,--verbose        report if the signal was successfully sent
  -V,--version        display version information
  -w,--wait           wait for processes to die


#Démarrage
#       eog&
#       pid=$!
#       sleep 2&&
#       killall $pid