Install & configure SSH in CentOS 6.X

By Raaz -

Today I am going to start writing an article about SSH installation and configuration in CentOS. SSH means Secure Shell. When ever we are doing any kind of remote transmission though telnet,It will transmit the information as clear text and anybody is in the network can see whats being transferred and username/password and other sensitive information which supposed to be very secure.So to protect remote data operations SSH invented.
For Information : http://en.wikipedia.org/wiki/Secure_Shell
--------------------- How to install SSH ----------------------
Open your terminal and type

yum install openssh-server openssh-clients


After installing it , we have to make it as autostart with system boot. to make it so execute below command
chkconfig sshd on
To start,stop,restart and to know status of service

service sshd start
service sshd stop
service sshd restart
service sshd status



-----------------------------------------------------------------
Now we have to configure SSH.
------------------------------------------------------------------
Main purpose of SSH is remote host access , so to accept remote incoming connections we must allow the port in IPTables. So add the below line IPTables

vim /etc/sysconfig/iptables
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT


Then restart IPTables

service iptables restart


---------------------------------------------------------------------
GIVE ME TIME TO UPDATE IT

Comments

Post a Comment

Popular posts from this blog

grep: unknown device method

By Raaz -
Today while using grep command via rundeck I was through grep: unknown device method  error. And the reason is due to I am having ' - ' in my search pattern I was through this error. I mean search includes grep "-search.this" /path/to/file Then you may get error with grep. So remove ' - ' in pattern and repeat your search. grep "search.this" /path/to/file Hope that helps.
Read more

Uploading files to FTP/SFTP using CURL

By Raaz -
Hello, Today I am writing below article which can help you to upload files to SFTP/FTP by using CURL. Ok why we need that ? Let me tell explain!! How we login into SFTP/FTP ? [root@virt03 test]# sftp 192.168.56.110 Connecting to 192.168.56.110... root@192.168.56.110's password: sftp> ls anaconda-ks.cfg       nodes                 post-install          post-install.log sftp> exit and uploading files with put command. Its a lengthy way. So recently I have gone through few articles and with some R&D I have modified it as script and command-line argument support.So you can call the script with filename as argument.  So Lets do this!!! Command 1 : This is for uploading a single to SFTP/FTP by using CURL.  SFTP curl -k  -u virt03:virt03 -T file4  sftp://192.168.56.110/home/virt03/ Syntax :  curl -k  -u username:password -T filename sftp://IP_Addreess OR Hostname:/path/to/upload  FTP curl -k  -u virt03:virt03 -T f
Read more

How to find outgoing IP in Linux ?

By -
Here is a small snippet to find outgoing IP of your Linux box. 1. To find the outgoing internal IP only         # ip route get 8.8.8.8 | head -1 | gawk '{ print $7 }' 2. To find the outgoing internal IP along with interface.   # ip route get 8.8.8.8 | head -1 | gawk '{ print $5,$7 }' 3. In-case if your system is connected to Internet, to find the outgoing external IP   # curl ifconfig.me Note:   In case if your system having public IP assigned then there is no difference between outgoing internal IP and external IP (both are same).
Read more