Install SSH Server on Linux (Debian, Ubuntu, Fedora, CentOS, RedHat)

Debian / Ubuntu

sudo apt-get install -y openssh-server

RPM based Distros, Fedora / CentOS / RedHat

sudo dnf install -y openssh-server

or use yum

sudo yum install -y openssh-server

Start ssh service

sudo systemctl start sshd

By default the SSH service should start when the system starts, but if not try the following command to enable the service on boot up.

Debian / Ubuntu

systemctl enable ssh

Fedora, CentOS, RedHat

systemctl enable ssh

Change SSH port

Not necessary, but it is a good idea to change the default ssh port.  To change the port edit the sshd file.

vi /etc/ssh/sshd_config

Install VirtualBox Guest Additions for Fedora 22

Install kernel headers, dkms, etc

dnf -y kernel-headers kernel-devel dkms gcc gcc-c++

Reboot the VM


Mount the Guest Additions by going to menu > Devices > Insert Guest Additions CD image… or you can hit “Host + D”.

The Host key is typically the Right Ctrl(On Windows) or CMD(On OS X) key.


Installing the Guest Additions

Via the GUI

Mount the Guest Additions from your file browser, and then launch the “”.

You will need root privileges, so either launch your file browser as root, or drag and drop the “”, into a root terminal and hit Enter.

Via Command Line

mkdir /tmp/vbox
sudo mount /dev/cdrom /tmp/vbox
sudo /tmp/vbox/

If you run into any errors, try ejecting, and remounting the Guest Additions cd.

Install Wireless Broadcom Driver for Fedora 21

Run the following commands as root

rpm -Uvh
rpm -Uvh

Update the system and then download the driver.

yum update
yum install kmod-wl

When the above commands finish reboot the computer


How to set a static ip address on CentOS, Fedora, or Red Hat Linux

Open up the following file with your favorite text editor. Change eth0 to the interface you need, like “wlan0” or “eth1”.

 vi /etc/sysconfig/network-scripts/ifcfg-eth0

The file should look something like the following.


To set the static IP address change “BOOTPROTO=dhcp” to “BOOTPROTO=static” and add the following to the end of the file. If you want/need the interface to come up when the computer boots up then be sure to change “ONBOOT=no” to “ONBOOT=yes”.


So your file should now look like this.


Save the file and restart networking.

service network restart

Finally, check you IP address with ifconfig.

root@localhost ~]# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 0A:2G:F3:56:66:4B  
          inet addr:  Bcast:  Mask:


How To Make a Live Bootable Fedora Thumb Drive in Linux

Insert your thumb drive into the computer.

We need to find out where the thumb drive is mounted.  We can do this with the “df” command as shown below or you can find it in dmesg.

So if we run the df command

df -h

It returns something like this

[me@fedora ~]$ df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/fedora-root   50G   11G   37G  23% /
devtmpfs                 1.9G     0  1.9G   0% /dev
tmpfs                    1.9G  1.2M  1.9G   1% /dev/shm
tmpfs                    1.9G  1.1M  1.9G   1% /run
tmpfs                    1.9G     0  1.9G   0% /sys/fs/cgroup
tmpfs                    1.9G   52K  1.9G   1% /tmp
/dev/sdb1                477M  115M  333M  26% /boot
/dev/mapper/fedora-home  176G  125G   42G  75% /home
/dev/sdc1                3.8G  3.2G  592M  85% /run/media/me/136A-7360
[me@fedora ~]$

Note that the bottom one is the thumb drive /dev/sdc1 yours may differ.

Now that we know where the drive is mounted we can write the image to the thumb drive.

Change the path in “if=/” to the path to your Fedora iso and change “of=/” to you thumb drive path

su -c "dd if=/home/me/Downloads/Fedora-Live-x86_64-20-1.iso of=/dev/sdc bs=8M"

It will take a couple of minutes to complete and it will not give you any information until it is finished.

Congratulations, you now have a live working Fedora thumb drive.

How to Install Flash on Linux

Installing flash on Ubuntu is pretty straight forward.  Type the following command into a terminal and press enter and away you go.

sudo apt-get install flashplugin-installer

On Fedora need to do the following


sudo yum install -y


sudo yum install -y

And install the Adobe Flash web browser plugin.  The first command imports the GPG key for the Adobe Flash plugin repository and the second command installs the plugin itself.

sudo rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux 
sudo yum install flash-plugin -y

How to Install VirtualBox on Fedora in 10 Steps

1.  Open a terminal and change to the root user

su -

2.  Then cd into the following directory

cd /etc/yum.repos.d/

3.  Install wget.

yum install wget

4.  Download the repo files with wget.


5.  Install the dependencies.

yum install binutils gcc make patch libgomp glibc-headers glibc-devel kernel-headers kernel-devel dkms

6.  Update your computer.

yum update

7.  Install VirtualBox.

yum install VirtualBox-4.2

8. Add the VirtualBox user to the vboxusers group

usermod -a -G vboxusers user_name

9.  Reboot your computer.


10.  Enjoy.  If you run into problems try the following.

/etc/init.d/vboxdrv setup

I have created a script that will do all this for you, download here.  All you need to do is the following 3 commands.

cd /pathto/
chmod +x
sudo ./



How to Open a Port on Redhat, CentOS or Fedora Linux

By default iptables firewall stores its configuration at /etc/sysconfig/iptables file. You need to edit this file and add rules to open port number.

Open port 80

To open a different port just enter the port number.

Open flle /etc/sysconfig/iptables:

# vi /etc/sysconfig/iptables

Append rule as follows:

A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT

Save and close the file.  Restart iptables:

# /etc/init.d/iptables restart


#service iptables restart


Verify that port is open

Run the following command:

netstat -tulpn | less

Make sure iptables is allowing the port you enabled:

iptables -L -n

If you need more info you can refer to the man page:

man iptables