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Troubleshoot - by Hostrare

Update On: 23 Jul 2021rsync and scp over non-standard ssh port and key

There are various options open to Rsync and SCP over non-standard ssh ports and key data. Here is a simple part to back up your records and configure them with Cron jobs.
Rsync is a great tool that permits you to transfer and synchronize data between servers. The control can be applied over SSH which encrypts the link. It also gives a lot of choices that can be used such as archive mode, backup mode, data compression during the transfer, etc.
SCP permits files to be followed to, from, or within many hosts. It manages ssh for data transfer and gives the same authentication and same level of safety as ssh. By default, SCP uses the Triple-DES cipher to encrypt the data being sent. Using the Blowfish cipher has been shown to improve speed. This can be done by using choice -c blowfish in the centerline.

rsync and scp over non-standard ssh port and key

Create a password-less SSH-key on the server

If you want to create a password less ssh key auth without asking the password, use below steps to configure it.

Generate SSH key pair

#ssh-keygen

Make sure you gave valid path.

Authorize the SSH public key

Once created we can authorize the usage of the SSH key pair by adding the SSH public key inside a file called authorized_keys situated inside the .ssh/ folder:

Copy .ssh/id_rsa.pub to remote client server .ssh/authorized__keys

Verify the authentication is working fine.

# ssh @

Rsync over non-standard ssh port and key

There are many options and command available in Rsync to copy the files, here given an only simple example.

Over non-standard ssh port

# rsync -avz -e "ssh -p $portNumber" /source/dir/ user@remoteip:/remote/dir

Over ssh key

# rsync -avz -e "ssh -i /home/ssh-key.pem" /source/dir/ user@remoteip:/remote/dir

Different port and SSH key

# rsync -avz -e "ssh -p $portNumber -i /home/ssh-key.pem" /source/dir/ user@remoteip:/remote/dir

SCP over non-standard ssh port and key

There are many options and command available in SCP to copy the files, here given only simple example.

Over non-standard ssh port

# scp -r -P $portNumber /source/dir/ user@remoteip:/remote/dir

Over ssh key

# scp -r -i /home/ssh-key.pem /source/dir/ user@remoteip:/remote/dir

Different port and SSH key

# scp -r -P $portNumber -i /home/ssh-key.pem /source/dir/ user@remoteip:/remote/dir