Copying files between linux machines using scp and ssh without linux user passwords
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This document provides instructions for copying files between Linux machines using scp and ssh without passwords. It describes generating an SSH key pair on both machines, copying the public key to the authorized_keys file on the destination server. It then explains how to use the scp command along with the private key to copy files from the source server to a destination directory on the destination server. It also provides a cron job example to automatically copy files from the source server to the destination server every two minutes.
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.