Restart Ssh Service

Posted on  by 



-->

  1. Restart Ssh Service In Debian
  2. Restart Ssh Service On Ubuntu
  3. Vmware Restart Services Ssh

You must have server root access to restart SSH service on a linux server. The below commands will work only if your linux server is CentOS 6 or RHEL 6 release. Before doing the below steps you must check the file “/etc/redhat-release” to find the OS version. root@server $ cat /etc/redhat-release.

As for your restarting issue, systemd's behavior seems logical. The assumption is that if you're trying to restart a service then you actually want it running-a reasonable assumption, since you yourself have already assumed it's running and don't wish to stop it. 'systemctl -t service' will tell you which services are currently running. Sudo service ssh status sudo service ssh restart Share. Improve this answer. Follow answered Apr 10 '20 at 8:30. Sarkiroka sarkiroka. 131 3 3 bronze badges. Add a comment 2. As stated in the comments the main service is ssh.service. But you can it also address with sshd.service.

Overview

PowerShell remoting normally uses WinRM for connection negotiation and data transport. SSH is nowavailable for Linux and Windows platforms and allows true multiplatform PowerShell remoting.

  1. # service sshd restart or # /etc/init.d/sshd restart For systemd Systems # systemctl restart sshd or # systemctl restart sshd.service 4) How To Reload The ssh Service In Linux? Use the below commands to reload the ssh server in Linux. For SysVinit Systems # service sshd reload or # /etc/init.d/sshd reload For systemd Systems.
  2. If you prefer to use your own terminal to enter shell commands instead off CALL QP2TERM then you will need to make sure the SSH server is started on your IBM.

WinRM provides a robust hosting model for PowerShell remote sessions. SSH-based remoting doesn'tcurrently support remote endpoint configuration and Just Enough Administration (JEA).

SSH remoting lets you do basic PowerShell session remoting between Windows and Linux computers. SSHremoting creates a PowerShell host process on the target computer as an SSH subsystem. Eventuallywe'll implement a general hosting model, similar to WinRM, to support endpoint configuration andJEA.

The New-PSSession, Enter-PSSession, and Invoke-Command cmdlets now have a new parameter set tosupport this new remoting connection.

To create a remote session, you specify the target computer with the HostName parameter andprovide the user name with UserName. When running the cmdlets interactively, you're prompted fora password. You can also use SSH key authentication using a private key file with theKeyFilePath parameter. Creating keys for SSH authentication varies by platform.

General setup information

PowerShell 6 or higher, and SSH must be installed on all computers. Install both the SSH client(ssh.exe) and server (sshd.exe) so that you can remote to and from the computers. OpenSSH forWindows is now available in Windows 10 build 1809 and Windows Server 2019. For more information, seeManage Windows with OpenSSH. For Linux,install SSH, including sshd server, that's appropriate for your platform. You also need to installPowerShell from GitHub to get the SSH remoting feature. The SSH server must be configured to createan SSH subsystem to host a PowerShell process on the remote computer. And, you must enablepassword or key-based authentication.

Set up on a Windows computer

  1. Install the latest version of PowerShell. For more information, seeInstalling PowerShell Core on Windows.

    You can confirm that PowerShell has SSH remoting support by listing the New-PSSession parametersets. You'll notice there are parameter set names that begin with SSH. Those parameter setsinclude SSH parameters.

  2. Install the latest Win32 OpenSSH. For installation instructions, seeGetting started with OpenSSH.

    Note

    If you want to set PowerShell as the default shell for OpenSSH, seeConfiguring Windows for OpenSSH.

  3. Edit the sshd_config file located at $env:ProgramDatassh.

    Make sure password authentication is enabled:

    Create the SSH subsystem that hosts a PowerShell process on the remote computer:

    Note

    The default location of the PowerShell executable is c:/progra~1/powershell/7/pwsh.exe. Thelocation can vary depending on how you installed PowerShell.

    You must use the 8.3 short name for any file paths that contain spaces. There's a bug inOpenSSH for Windows that prevents spaces from working in subsystem executable paths. For moreinformation, see this GitHub issue.

    The 8.3 short name for the Program Files folder in Windows is usually Progra~1. However,you can use the following command to make sure:

    Optionally, enable key authentication:

    For more information, see Managing OpenSSH Keys.

  4. Restart the sshd service.

  5. Add the path where OpenSSH is installed to your Path environment variable. For example,C:Program FilesOpenSSH. This entry allows for the ssh.exe to be found.

Set up on an Ubuntu 16.04 Linux computer

  1. Install the latest version of PowerShell, seeInstalling PowerShell Core on Linux.

  2. Install Ubuntu OpenSSH Server.

  3. Edit the sshd_config file at location /etc/ssh.

    Make sure password authentication is enabled:

    Optionally, enable key authentication:

    For more information about creating SSH keys on Ubuntu, see the manpage forssh-keygen.

    Add a PowerShell subsystem entry:

    Note

    The default location of the PowerShell executable is /usr/bin/pwsh. The location can varydepending on how you installed PowerShell.

    Optionally, enable key authentication:

  4. Restart the ssh service.

Set up on a macOS computer

  1. Install the latest version of PowerShell. For more information,Installing PowerShell Core on macOS.

    Make sure SSH Remoting is enabled by following these steps:

    1. Open System Preferences.
    2. Click on Sharing.
    3. Check Remote Login to set Remote Login: On.
    4. Allow access to the appropriate users.
  2. Edit the sshd_config file at location /private/etc/ssh/sshd_config.

    Use a text editor such as nano:

    Make sure password authentication is enabled:

    Add a PowerShell subsystem entry:

    Note

    The default location of the PowerShell executable is /usr/local/bin/pwsh. The location canvary depending on how you installed PowerShell.

    Optionally, enable key authentication:

  3. Restart the sshd service.

Authentication

PowerShell remoting over SSH relies on the authentication exchange between the SSH client and SSHservice and doesn't implement any authentication schemes itself. The result is that any configuredauthentication schemes including multi-factor authentication are handled by SSH and independent ofPowerShell. For example, you can configure the SSH service to require public key authentication anda one-time password for added security. Configuration of multi-factor authentication is outside thescope of this documentation. Refer to documentation for SSH on how to correctly configuremulti-factor authentication and validate it works outside of PowerShell before attempting to use itwith PowerShell remoting.

Note

Users retain the same privileges in remote sessions. Meaning, Administrators have access to anelevated shell, and normal users will not.

PowerShell remoting example

The easiest way to test remoting is to try it on a single computer. In this example, we create aremote session back to the same Linux computer. We're using PowerShell cmdlets interactively so wesee prompts from SSH asking to verify the host computer and prompting for a password. You can do thesame thing on a Windows computer to ensure remoting is working. Then, remote between computers bychanging the host name.

Limitations

  • The sudo command doesn't work in a remote session to a Linux computer.

  • PSRemoting over SSH does not support Profiles and does not have access to $PROFILE. Once in asession, you can load a profile by dot sourcing the profile with the full filepath. This is notrelated to SSH profiles. You can configure the SSH server to use PowerShell as the default shelland to load a profile through SSH. See the SSH documentation for more information.

  • Prior to PowerShell 7.1, remoting over SSH did not support second-hop remote sessions. Thiscapability was limited to sessions using WinRM. PowerShell 7.1 allows Enter-PSSession andEnter-PSHostProcess to work from within any interactive remote session.

See also

You must have server root login details to restart SSH service. The server login details will be provided by your webhosting company/Datacenter. You can log into the server using putty software. Putty software can be downloaded from the website putty.org and you can connect to your server via SSH. Use systemctl command instead of ‘service’ command to restart service on CentOS 7 and RHEL 7 servers. RHEL 7 and CentOS 7 migrated to Systemd and commands like ‘service’ and ‘chkconfig’ is now done using ‘systemctl’.

Example:

root@server [~]# service sshd restart
Redirecting to /bin/systemctl restart sshd.service
In the above CentOS 7 server you can see that “service sshd restart” command gets redirected to new command “systemctl restart sshd.service”. SSH Service is restarted but it shows from now on you should use “systemctl” command to restart instead of using ‘service’ command.

“/etc/init.d/sshd restart” command will not work on centOS 7 servers. You will see the below error if you try to restart using that command.

Restart Ssh Service In Debian

[root@server]# /etc/init.d/sshd restart
-bash: /etc/init.d/sshd: No such file or directory
CentOS 7 servers have systemd so the commands are entirely different and these commands will not work on server with CentOS 6 and older versions. You must make sure the OS is version 7 before running the below commands.

HOW TO RESTART SSH SERVICE ON CENTOS 7 / RHEL 7 server

Do the below steps to restart SSH service on CentOS 7 / Redhat 7 Servers.

1. Log into your Linux Server via SSH as ‘root’ user

2. Run the command ‘systemctl restart sshd.service’ to restart SSH

Command 1 : service sshd restart

OR

Command 2 : systemctl restart sshd.service

root@server [~]# service sshd restart
Redirecting to /bin/systemctl restart sshd.service

root@server [~]# systemctl restart sshd.service
root@server [~]#

HOW TO CHECK STATUS OF SSH SERVICE ON CentOS 7 / RHEL 7 server

The below commands can be used to check the current status of SSH service, it will show whether the service is active or inactive.

1. Log into your Linux server as ‘root’

2. Run the Command ‘systemctl status sshd.service’ to check status of SSH service.

Command 1 : service sshd status

Restart Ssh Service On Ubuntu

OR

Command 2 : systemctl status sshd.service

root@server [~]# systemctl status sshd.service
* sshd.service – OpenSSH server daemon
Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
Restart ssh service windows Active: active (running) since Sun 2016-04-24 20:14:10 EDT; 1min 10s ago
Docs: man:sshd(8)
man:sshd_config(5)
Main PID: 2881 (sshd)
CGroup: /system.slice/sshd.service
`-2881 /usr/sbin/sshd -D

Apr 24 20:14:10 server systemd[1]: Started OpenSSH server daemon.
Apr 24 20:14:10 server systemd[1]: Starting OpenSSH server daemon…
Apr 24 20:14:10 server sshd[2881]: Server listening on 0.0.0.0 port 22.
Apr 24 20:14:10 server sshd[2881]: Server listening on :: port 22.

Active: inactive (dead) —> If the status shows “inactive (dead)” then it means SSH service is not running on this server

Active: active (running) —> If the status is “active (running)”, it means SSH service is running fine on this server

HOW TO START SSH SERVICE ON CENTOS 7 / REDHAT 7 SERVERS

Run the below command to start SSH service (if the service is not running)

1. Log into Linux server as root user

2. Run the below command to start SSH service

Command 1 : systemctl start sshd.service

OR

Command 2 : service sshd start

HOW TO STOP SSH SERVICE ON CENTOS 7 / REDHAT 7 SERVERS

Run the command ‘systemctl stop sshd.service’ to restart SSH service.

NOTE : The below commands will stop sshd service on your server and you might get disconnected from SSH. Run this command only if you have console access so that you can start the service.

Command 1 : service sshd stop

OR

Command 2 : systemctl stop sshd.service

root@server [/]# systemctl stop sshd.service

OR

root@server [/]# service sshd stop
Redirecting to /bin/systemctl stop sshd.service

In the below server you can see that process ID of SSH service is 221572, killing this process will stop SSH service and you will get disconnected from the server.
[root@server /]# ps aux | grep ssh
root 221572 0.0 0.0 64348 1180 ? Ss Jan26 0:55 /usr/sbin/sshRestart

Command to kill the above SSH process : kill -9 221572

chkconfig commands will not work on centOS 7 servers so you must use the below commands to enable and disable the SSH service in the runlevel.

Enable SSH service : systemctl enable sshd

Disable SSH service : systemctl disable sshd

Run the below commands to check whether SSH service is enabled and active

[root@server ~]# systemctl is-failed sshd.service
active

[root@server ~]# systemctl is-active sshd.service
active

Vmware Restart Services Ssh

[root@server ~]# systemctl is-enabled sshd.service
enabled





Coments are closed