Linux-kill后台进程如何屏蔽shell输出kill的消息

Question

#!/bin/sh

killall()
{
 ps x | grep vi | sed '/grep/d' | awk '{printf $1" "}' | xargs kill -9 &>/dev/null
}
tmp_file="aa.t"
rm -f $tmp_file

mkfifo $tmp_file
exec 11<>$tmp_file
rm -f $tmp_file

vi <&11 &>/dev/null &

killall &>/dev/null

Answer 1

kill -9 改为 kill -2