Copying files between linux machines using scp and ssh without linux user passwords

1. PREPARED BY RAVI KUMAR LANKE Page 1
Copying files between linux machines using scp
and ssh without linux user passwords

2. PREPARED BY RAVI KUMAR LANKE Page 2
1. Setup ssh keys on both machines
To generate a public / private key pair :
$ ssh-keygen -t rsa
The above will generate 2 files, ~/.ssh/id_rsa (private key) and /home/ oracle /.ssh/id_rsa.pub (public key)
To setup the SSH keys for usage (one time task) : Copy the contents of /home/ oracle /.ssh/id_rsa.pub of source server and paste in a new line
of /home/ oracle /.ssh/authorized_keys of destination server
If /home/oracle/.ssh/authorized_keys doesn't exist, feel free to create it.
2. To copy files use the below command
change to destination directory in destination server and run the below command
$scp -i ~/.ssh/id_rsa oracle@source_server_hostname:/u01/oracle/backup/*.* .
Cron job :
make a shell script as below and save it as filescopy.sh:
#!/bin/sh
backup_dir="/home/oracle/ backup"
cd $backup_dir
scp -i ~/.ssh/id_rsa oracle@source_server_hostname:/home/oracle/backup/*.* .
Now run the cron job on the destination server with above script
$crontab -e
Enter the below line
*/2 * * * * /u01/filescopy.sh > /u01/backup.log 2>&1
save and exit
It will copy the files into the destination server for every 2 sec.