Using "wget" command for transferring files in Linux machines

Enable the http server in a Linux machine

Go to, vim /etc/httpd/conf/httpd.conf (In Redhat)

Look for "Listen X.X.X.X:80", remove the # mark before it and change it to "0.0.0.0:80"

Now restart the service using the command:

service httpd restart

Not go to some Client machine, which is directly reachable from the Server. And you can get files from  the server using the command:

If you want to get a file "sample.txt" from "/var/www/html" folder, use the following command:

wget ftp://USER:PASSWORD@192.168.10.11://file.txt

1) Provided the Server is reachable with IP 192.168.10.11 and user credentials as "USER", password as "PASSWORD".
2) "/var/www/html" is the default location where the files are stored.
To change this location, go to file "/etc/httpd/conf/httpd.conf" and look for "DocumentRoot" and change this "/var/www/html" to "/home/user/" and then restart the httpd service, now you can download files from "/home/user"
e.g. To download a file with name "sample.tgz", use

wget ftp://user:user123@192.168.10.11://home/user/sample.txt

How to Start ftp service in Linux

1) FTP ( File Transfer Protocol ) is the simplest and most secure way to exchange files over    internet/intranet.
2) Transferring files from a client computer to a server  is called " Uploading" and transferring from a
 server to a client is “Downloading”
3) Port :21 is used for Control connection and Port 20 is used for Data Connection

Setting up and "ftp" server

SERVER SIDE :
Required package: vsftpd
Use this command to install the package (in Ubuntu): sudo apt-get install vsftpd

Changing configuration file "vsftpd.conf"; for allowing other users to access/write data.
vim /etc/vsftpd.conf
local_enable=YES
write_enable=YES
#anon_upload_enable=YES
After finishing the required changes 'save' and 'exit' from the .conf file

Now restart the "ftp" service using the following command:
sudo /etc/init.d/vsftpd restart
OR
service vsftpd start
Some other self explanatory commands:
service vsftpd status
service vsftpd stop
service vsftpd restart

CLIENT SIDE :
To do ftp to X.X.X.X IP PC we use,
ftp X.X.X.X
ftp>
Use the following commands within the 'ftp' command prompt:
Basic get/put commands
get filename
put filename
put/get commands with confirmation
mget filename
mput filename

bye-to exit from the ftp command prompt.

Find and Replace in Shell/Bash Scripts

We can do this Find and Replace task in Scripts using vi/vim editors.

Open your Script with vi/vim editor, then
:%s/WordToReplace/ReplaceWith/g

Finding and Replacing a word with Confirmation
:%s/WordToReplace/ReplaceWith/gc

Case Insenitive Finding and Replacing
:%s/OLD/new/gi
This will find all the words "Old, OLd,olD..." and Replaces with word "new"

Case Insensitive Find and Replace
:%s/OLD/new/gI

Find and Replace between L1 and L2 lines
:L1,L2s/OLD/new/g

Finding and Replacing only specific word

:%s/\<OLD\>/new/gc

Commenting some lines of code in Shell/Bash Scripts

To comment a set of lines in a Shell script:
1) Using if false and fi

#!/bin/bash
a=2
if false
then 
b=a
echo a
printf "-------\n"
fi
printf "%d %d\n", a, b

2) Using Comments

#!/bin/bash
a=2
<<COMMENT
b=a
echo a
printf "-------\n"
COMMENT
printf "%d %d\n", a, b

3) Using Search and Replace option

To comment code between lines L1 and L2 we can use
:L1,L2s/^/#/

Static ARP entries in Linux

Sometimes ARP between machines may not resolve. In that case we may need to add Static Routes manually.
Adding a Static ARP in Linux Machine:

#arp -s <IPAddr> <MAC>

Deleting a Static ARP in Linux Machine: 

#arp -d <IPAddr>

IPAddr - IP Address of the Host (Other PC) 
MAC - Other PC MAC

Changing the Hyperlink font colour in Power Point 2007

Hi, To change the Hyperlink font colour in Power point..
First click on 'Design' button then look for 'colors' button, expand it find 'create new theme colors..' option. Open it..there u find the 'Hyperlink' option. So change the color of ur interest..