Linux monitors running shell scripts for a process

The script implements a 2-per-scan monitoring of the process for the specified process name and restarts once the discovery process does not exist.

#!/bin/sh

a=10;

While [[@a-gt 5]]; Do

if test $ (pgrep-f $1|wc-l)-eq 2;then

SH stop.sh

Gnome-terminal-x SH start.sh &

Fi

Sleep 2;

Done

Summary: (1) & indicates that the current process starts a process to execute the gnome-terminal command, (2) The parent process of Linux hangs up, the child process is not hung, but the parent process of the child process is set to 1 (init process), and (3) The command jobs-l to view the running process in the background; View the method Ps-ef|grep 20197 of the parent process for process 20197.

My question: pgrep-f $1|wc-l in SH and the result of running in the terminal is not the same, why do not exist in sh, is 2? , Welcome to comment discussion ~ ~

Linux monitors running shell scripts for a process