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I want to write a shell script and put it in a cron. This shell script will copy one particular directory from my server to another server everyday once. So, I don't want it to prompt for passwords. Is there something that I can add in my script so that it wont ask for passwords everyday?

darecoder
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  • You will want to see [**How to setup the passwords-less authentication between two different accounts**](http://stackoverflow.com/questions/36171227/how-to-setup-the-passwords-less-authentication-between-two-different-accounts/36172337?s=1|0.4401#36172337) and then use `rsync` within your `cron` script to backup files from host1 to host2. – David C. Rankin Aug 08 '16 at 06:30

3 Answers3

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You need to have a password less SSH Login in your Unix Boxes

Below link describe how to set password less SSH login

http://www.tecmint.com/ssh-passwordless-login-using-ssh-keygen-in-5-easy-steps/

you can use FTP or NDM to transfer the Files

In this way you can achieve your requirement.

Bhavesh
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    Can I use rsync? because I need this script to run everyday, so instead of copying again and again, It will just update. If this is possible then explain how?? – darecoder Aug 04 '16 at 10:36
  • I have never used rsync in my case we get fresh new files daily so we copy daily – Bhavesh Aug 04 '16 at 11:39
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    Using this script I am able to achieve what I mentioned earlier : com="sshpass -p Password0 scp arul@172.25.184.93:/home/arul/test.sh ." eval $com – darecoder Aug 08 '16 at 05:15
  • Thanks for sharing – Bhavesh Aug 11 '16 at 03:29
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Using the below script, I am able to achieve what I mentioned :

#!/bin/bash com="sshpass -p Password0 scp arul@172.25.184.93:/home/arul/test.sh ." eval $com

darecoder
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You can use RSA key option also for this. Using RSA key you can authorized your second server in first server. This is one time operation.

 ssh-copy-id -i ~/.ssh/id_rsa.pub [Your 2nd server IP]

Example:-

[root@vasmon home]#  ssh-copy-id -i ~/.ssh/id_rsa.pub xxx.xxx.xxx.xxx
root@xxx.xxx.xxx.xxx's password: 
Now try logging into the machine, with "ssh 'xxx.xxx.xxx.xxx'", and check in:

.ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.
[root@vasmon home]#
UUU
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