Linux Commands

There are multiple ways to copy file...                  

To Copy File From your system to remote system

$ scp -i  key_file  'path to copy file' username@host_name:'target_location_to_paste'.


To Copy File from remote System to your system

$ scp -i  key_file  username@host_name:'target_location_to_copy' 'path to paste file'.

To Find id of a Process.

ps aux | grep 'name_of_software'

Eg:  ps aux | grep tomcat

Note: remove ' 'quotations.

How to Find out Size of file in linux/unix environment,
There are multiple commands to do this...

1. ls
2. du
3. stat

Each one display result(size) in different way.

let see about ls command

If you want to to check size of a zip file 

>$ ls -l filename.zip

-rw-rw-r--. 1 root root 24882 Oct 26 18:44  filename.zip

if you want to see some more user friendly response, then try with 

$ ls -lh filename.zip 

-rw-rw-r--. 1 root root 25K Oct 26 18:44 filename.zip

Now try with du command

>$ du -h filename.sql

3.8M filename.sql

and lastly see the output for stat command

>$  stat filename.sql
  File: `filename.sql'
  Size: 3902512   Blocks: 7624       IO Block: 4096   regular file
Device: ****/***** Inode: 23859810    Links: 1
Access: (0664/-rw-rw-r--)  Uid: (  500/  root)   Gid: (  500/  root)
Access: 2014-04-26 11:56:06.941036903 +0530
Modify: 2014-04-26 11:55:07.927037477 +0530
Change: 2014-04-26 11:56:04.802038739 +0530