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ssh command

How To SSH Run Multiple Command On Remote Machine And Exit Safely

I have a backup sync program on local server. I have an ssh password less login set up, and I can run commands on an external server in bash script doing:

ssh root@server2 "sync; sync; /sbin/shutdown -h now"

How do I run multiple commands in bash on a remote Unix or Linux server? What is the best way to SSH in and run various unix commands in a bash shell?
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I need to tunnel X Window securely over SSH bases session so that I run X program on my remote Linux/Unix server/workstation and get back display to my Apple Macbook pro laptop. I tried the ssh -X user@server1 and ssh -Y user@server2 commands on both OS X Mountain Lion and Apple OS X Mavericks/Yosemite. But, I am unable to use the ssh command with X11.

How do I fix this problem on OS X and enable X11 forwarding with ssh command? How do I install XQuartz (X11.app) server on Apple OS X Mountain Lion or Mavericks or Yosemite?
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Set Up SSH Tunneling on a Linux / Unix / BSD Server To Bypass NAT

I‘m a new Linux / Unix system user. How can I set encrypted tunnel between my desktop/laptop computer and server in a remote data center to bypass the limits in a network? How do I create a reverse SSH tunnel on Unix-like systems?
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HowTo: Update gcutil / gcloud Components On a Linux / Unix / OS X

How can I update for Google Cloud SDK components on a Linux or OS X unix based systems?
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FreeBSD Show Disk Quota Limits Command

I‘m a new FreeBSD unix user and backup file on a FreeBSD based unix server. How can I check quota limits and disk usage using shell prompt on a FreeBSD based system?
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What Does –– (double dash) Mean In SSH Shell Command?

I see lots of seasoned admins and cloud provider wrapper scripts use ssh client command as follows in shell:

ssh nixcraft@server1.cyberciti.biz --

What the double -- (dash) does here? Why it is used in this shell command and why not just use the following?

ssh nixcraft@server1.cyberciti.biz
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Change Password Using passwd Command Over SSH Based Session

I‘m a new Ubutnu Linux user. I backup files to our corporate Unix backup server using the rsync command. The server only allow to upload/download files. I am unable to login to the server. How do change my password using the passwd command over ssh based session?
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OpenSSH Config File Examples

How do I create and setup an OpenSSH config file to create shortcuts for servers I frequently access under Linux or Unix desktop operating systems?
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SSH Into Google Cloud Compute Engine Instance Using Secure Shell Client

I need to set and test my web-app using Google cloud compute engine. How do I connect to an Instance Using ssh on Ubuntu Linux or Apple OS X based system?
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scp: Do not Overwrite Existing File On Linux or Unix System

I am a new Linux user. I use scp to upload files to net-storage provided CDN company. I do not want to overwrite the existing files. How can I prevent overwriting of files when using scp command under Linux, Mac OS X or Unix like operating systems?
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