Shell脚本可在远程执行命令，然后退出Shell可在本地执行下一步操作

Question

I'm writing a shell script to perform a series of actions in remote. Then I want to come back to local and perform the next series of actions. When I use exit, I'm exiting from the shell script instead of logging out of the remote machine.

set -x

ssh $1

cd /var/log/sysstat/

for (( i = 11; i <= 19; i++ ))

do

 sar -f $i >> /home/sirish.aditya/cpu_11-19.csv

 sar -f $i -r >> /home/sirish.aditya/mem_11-19.csv

done

exit 

mkdir /Users/sirish.aditya/workSpace/cpustats_srm/$1

scp sirish.aditya@$1:/home/sirish.aditya/mem_11-19.csv /Users/sirish.aditya/workSpace/cpustats_srm/$1

scp sirish.aditya@$1:/home/sirish.aditya/cpu_11-19.csv /Users/sirish.aditya/workSpace/cpustats_srm/$1

--

ssh sirish.aditya@remote_machine 'bash -s' < memory.sh remote_machine

Can somebody help on this?

Thanks in advance

Answer 1

You can extract the part of the remote execution to external script and then conditional piping it to exit function.

For example:

exec_in_remote.sh :

#!/bin/bash

cd /var/log/sysstat/    
for (( i = 11; i <= 19; i++ ))
do
 sar -f $i >> /home/sirish.aditya/cpu_11-19.csv
 sar -f $i -r >> /home/sirish.aditya/mem_11-19.csv
done

And then in your main script:

set -x
ssh $1 'bash -s' < exec_in_remote.sh

mkdir /Users/sirish.aditya/workSpace/cpustats_srm/$1
scp sirish.aditya@$1:/home/sirish.aditya/mem_11-19.csv /Users/sirish.aditya/workSpace/cpustats_srm/$1
scp sirish.aditya@$1:/home/sirish.aditya/cpu_11-19.csv /Users/sirish.aditya/workSpace/cpustats_srm/$1

And run it as you mentioned above:

ssh sirish.aditya@remote_machine 'bash -s' < memory.sh remote_machine

Answer 2

Try this,

set -x

ssh $1 <<'EOT'

cd /var/log/sysstat/

for (( i = 11; i <= 19; i++ ))

do

 sar -f $i >> /home/sirish.aditya/cpu_11-19.csv

 sar -f $i -r >> /home/sirish.aditya/mem_11-19.csv

done
EOT

mkdir /Users/sirish.aditya/workSpace/cpustats_srm/$1

scp sirish.aditya@$1:/home/sirish.aditya/mem_11-19.csv /Users/sirish.aditya/workSpace/cpustats_srm/$1

scp sirish.aditya@$1:/home/sirish.aditya/cpu_11-19.csv /Users/sirish

Uses a here doc to send the commands you are trying to run remotely.