SCP stands for secure copy.It is based upon SSH (Secure Shell) protocol.SCP is used for securely transferring the files between local and remote system.
Note: If SSH service is not running or deny by firewall or IPTABLES of system then SCP will also not work.

Syntax:
scp SOURCE-FILE-LOCATION TARGET-LOCATION

(1) SCP file from local to remote system

Run the below given command from your system

scp filename remote-username@remote-ip-address:/path/to/transfer/file

eg.

scp test.txt sharad@192.168.1.19:/tmp

(2) SCP Directory from local to remote system

Run the below given command from your system

scp -r directory-name remote-username@remote-ip-address:/path/to/transfer/directory

eg.

scp  -r testdir sharad@192.168.1.19:/tmp

(3) SCP file from remote to local system

Run the below given command from your system

scp remote-username@remote-ip-address:/path/of/target-FILE /path/in/your/localSystem

eg.

scp sharad@192.168.1.19:~/test.txt  ~/Desktop

(4) SCP directory from remote to local system

Run the below given command from your system

scp remote-username@remote-ip-address:/path/of/target-DIRECTORY /path/in/your/localSystem

eg.

scp -r sharad@192.168.1.19:~/testdir  ~/Desktop

If SSH port no. is changed from port no. 22 to other one

SSH port no. = 2211

(Note: SSH port no. might be different in your case hence give your ssh port no. instead of 2211)

Syntax:
scp -P port.no SOURCE-FILE-LOCATION TARGET-LOCATION

(1A) SCP file from local to remote system

Run the below given command from your system

scp -P port.no. filename remote-username@remote-ip-address:/path/to/transfer/file

eg.

scp-P 2211 test.txt sharad@192.168.1.19:/tmp

(2A) SCP Directory from local to remote system

Run the below given command from your system

scp -P port.no -r directory-name remote-username@remote-ip-address:/path/to/transfer/directory

eg.

scp  -p 2211 -r testdir sharad@192.168.1.19:/tmp

(3A) SCP file from remote to local system

Run the below given command from your system

scp -P port.no remote-username@remote-ip-address:/path/of/target-FILE /path/in/your/localSystem

eg.

scp -P 2211 sharad@192.168.1.19:~/test.txt  ~/Desktop

(4A) SCP directory from remote to local system

Run the below given command from your system

scp -P port.no remote-username@remote-ip-address:/path/of/target-DIRECTORY /path/in/your/localSystem

eg.

scp -P 2211-r sharad@192.168.1.19:~/testdir  ~/Desktop