SCP & Mount

SCP (Secured Copy)

scp relies on ssh to operate. scp is used to securely copy files/directories from/to remote location. The syntax of scp is identical to cp.

Syntax:  scp     -arg     source     destination

# scp  192.168.10.1:/root/f1  /home/sarmed	Copies the file ‘f1’ from remote host 192.168.10.1 to local directory /home/sarmed
# scp  f2  192.168.10.2:/home/sarmed	Copies the local file ‘f2’ to remote host 192.168.10.2 in the location /home/sarmed
# scp  –r  localdir  192.168.10.2:/home/sarmed	Copies local ‘localdir’ to remote host 192.168.10.2 in the location /home/sarmed
# scp  -P 87 192.168.10.1:/root/f3 /home/sarmed	Same as the first example. However, this time scp connects to port 87 instead of default ssh port 22.
# scp –P 87 sarmed@192.168.10.1:/home/sarmed/f4 /root	Same as the 4th example. Communicates with the remote host 192.168.10.1 at port 87 and as user sarmed. Copies the file f4 from the remote machine to /root in local host.

Mount

To access any physical device, it must be mounted to some logical location. By accessing the logical location, we actually access the physical device.

Syntax: command       -arg          source          destination

# mount  /dev/sdb1  /mnt	Mounts the physical partition /dev/sdb1 to logical location /mnt
# mount  /dev/sdc2  /media	Mounts the physical partition /dev/sdc2 to logical location /media
# mount  -t  nfs  192.168.10.1:/share  /newshare	Mounts the directory /share located in remote host 192.168.10.1 using NFS (network file system) to local /newshare. (NFS must be preconfigured in 192.168.10.1 for this command to work)
# mount –o  remount rw  /	Often used in recovery mode. –o = option. This command remounts / directory in rw mode