How to write Shell script to restart Centos system in a gentle way
This article introduces the knowledge of "how to write a Shell script to restart the Centos system in a gentle way". Many people will encounter this dilemma in the operation of actual cases, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!
The main purpose is to restart important processes in the background. If you use killall-9 to force kill to drop, it may cause problems. Such as database processes. The code is as follows:
The code is as follows:
#! / bin/sh
If [- z "$1"]; then
/ bin/echo "$0"
Exit 1
Fi
Param=''
List='2 3 4 5 6 7 8 9'
For i in $list; do
Eval packs are not available.
If [- z $p]; then
Break
Fi
Param= "$param $p"
Done
If [- f / bin/awk]; then
AWK=/bin/awk
Else
AWK=/usr/bin/awk
Fi
If [- f / bin/grep]; then
GREP=/bin/grep
Else
GREP=/usr/bin/grep
Fi
Program= `/ bin/echo $1 | $AWK-F'/'{print $NF;}'`
Count= `/ bin/ps auxww | $GREP-w $program | $GREP-v grep | / usr/bin/wc-l`
If [$count-gt 0]; then
ITunes 0
/ bin/echo "stopping $program..."
While [1-eq 1]; do
If [$I-eq 0]; then
/ usr/bin/killall $program
Else
/ usr/bin/killall $program > / dev/null 2 > & 1
Fi
If [$?-ne 0]; then
Break
Fi
/ usr/bin/printf.
/ bin/sleep 1
Let i=$i+1
Done
Fi
/ bin/echo ""
Count= `/ bin/ps auxww | $GREP-w $program | $GREP-v grep | $GREP-v $0 | / usr/bin/wc-l`
If [$count-eq 0]; then
/ bin/echo "starting $program..."
Exec $1$ param
Else
/ bin/ps auxww | $GREP-w $program | $GREP-v grep | $GREP-v $0
/ bin/echo "already running $program count: $count, restart aborted!"
Fi
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