How to operate Linux from the outside Procedure

[Learning environment]

Redhot series: CentOS Ssh connection software: TeraTerm Virtual machine: VirtualBox


How to access virtual local Linux with SSH

When accessing Linux using TeraTerm You must allow access from the outside.

"Set up CentOS network"


  1. Set user privileges to root
  2. Edit the file for network settings
  3. Make network settings
  4. Connect with TeraTeam


1. 1. Set user privileges to root

Execute $ su-(space between su and-)

root privilege command

$su -

You will be asked for your password. password is the password to log in to the host user (login screen) If you successfully become the root user here The symbol ($) waiting for a command command changes to #. スクリーンショット (418).png

2. Edit the file for network settings

Type the following command and press Tab instead of Enter.

# vi /etc/sysconfig/network-scripts/

Then, two patterns of screen display will appear, so it corresponds to each Please proceed with the pattern. (Tab key is a command that shows the next input candidate)

―――――――――――――――――――――――――――――― [Pattern 1] スクリーンショット (423).png

For the above pattern, look for ifcfg- ○○ and ifcfg-lo describe ifcfg- ○○ after # vi / etc / sysconfig / network-scriprs /

# vi /etc/sysconfig/network-scriprs/ifcfg-○○

After filling in the above, press Enter to move to [Editing Procedure]. ――――――――――――――――――――――――――――――

[Pattern 2] スクリーンショット (424).png

After filling in the above, press Enter to move to [Editing Procedure]. ―――――――――――――――――――――――――――――― [Editing procedure] The file to be edited this time is the ifcfg- ○○ file. By the way, ○○ is the setting file name of the network interface for connecting to the outside. It depends on the person, so you don't have to worry about it. スクリーンショット (426).png

When the above screen appears, follow the steps below.

  1. Press the i key to enter input mode
  2. Change ONBOOT = no at the bottom to yes
  3. Press Ctrl + C (or Esc) to cancel the input mode 4: Save the edit with the wq command and exit

3. Make network settings

Select "Virtual Machine"> "File" at the top right of the screen

"Network"> "Advanced"> "Port Fording"

Add settings. Host port: 3333 Guest port: 22 (Port number to connect with SSH)

Reboot when the settings are complete

# reboot

4. Connect with TeraTeam

Start TeraTerm

スクリーンショット (427).png

Host: TCP post# : 22

Set the number added in the network settings

スクリーンショット (428).png

Select Continue

スクリーンショット (429).png

After adding "User name" and "Passphrase" Select OK (* User name and password of the host created "User name" and "Passphrase")

That's it.

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