Five ways to copy files in Unix

Five ways to copy files in Unix

Satya UNIX Solution , , , ,

Five ways to copy files in Unix : Transfer of data or copying data is indispensable in computer science. There are in-numerous application of this process in today’s world. In this post, I will explain five different ways to copy files in Unix operating system, locally as well as remotely.

Five ways to copy files in Unix

 

Copy file using cp

cp is Unix command or utility to copy files or directory from source path to destination. Simple command create a copy of a file in current directory.

cp test.txt  test123.txt

 

Copy a file from source directory to target directory.

cp /tmp/config.txt /prod/conf

 

This is to copy file to parent directory.

cp /tmp/file.txt ..

Copy a directory(e.g. conf) recursively to home directory.

cp -r /prod/conf /home

 

Secure copy – scp

Scp is a secure remote copy program for Unix server. Using this we can copy file or directory from remote source to local host or local source to remote host. It copies files over the network using ssh, therefore uses password or passphrase for authentication.

Following  command show secure copy from remote_host to local host

scp remote_host:/src/file.dat  /tmp/

and to copy from local host to remote host use below command.

scp /tmp/hello.dat remote_host:/src/

FTP file transfer

FTP is file transfer protocol based on client server architecture. It is uses secure connection,  secured with SSL/TLS. You can use ftp commands in here document to transfer file.

#!/bin/sh
HOST='HOSTNAME'
USER='user_name'
PASSWD='your_password'
FILE='file.txt'

ftp $HOST <<END
user $USER
$PASSWD
put $FILE
quit
END
exit 0

 

 

rsync

Its a remote file copying tool, which is fast and versatile. It is versatile as it sync data rather copy entire data from the beginning.Below rsync command recursively copy bar directory from src path of a hostxy server to /data/tmp directory of local host. ‘-a’ specify archive mode that ensure that sym‐bolic links, devices, attributes, permissions, ownership, etc. are preserved in the transfer. ‘-z’ is specify compression mode, that ensure data compression during transfer. And, ‘-v’ is to increase verbosity.

rsync -avz hostxy:src/bar /data/tmp

 

Connect:Direct or NDM

Connect:Direct or NDM(Network data mover) is file transfer program, which copy file from source server to target.

We can use this in both Mainframe and Mid-range to transfer file. It uses TCP/IP to transfer file and more made file transfer routine and reliable.

Following a step in NDM to tranfer file.

remote_host=remote_server
source_file=/opt/test/test_file.dat
dest_file=new_file.dat

ndmcli -x <<-EOF
  submit maxdelay=unlimited
  procname123
  process
  pacct=""C:D testTransfer""
  snode=$remote_host

  step01
  copy from (file = $source_file)
  compress = extended
  to (file = $dest_file
  snode
  disp = new)
  pend;
  EOF


 

 

 

 

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