The article describes how to reboot the NetScaler
OR
Best Practices for rebooting NetScaler

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Instructions

1. Make sure you are on correct NetScaler.
2. Do a save config by clicking on Floppy Sign present at the top right corner in GUI or run "save c" command on CLI. (Prefer CLI)
3. Once it shows done, compare the content of running config and ns.conf and make sure they are same.

       For comparing follow the below steps:

• On CLI run the command show run.
• Copy paste the output of it on any comparing tool like Beyond Compare.
• Go to shell prompt of NetScaler by running the command shell.
• Go to /flash/nsconfig and copy the content of ns.conf.
• Paste the content of ns.conf on the other half of comparing tool.
• Make sure that every line is same.

4. Now reboot the NetScaler by CLI or GUI.

• For CLI:
  • Command to reboot from CLI is "reboot"
  • >reboot (This is a cold restart)
  • >reboot -warm  (Restarts the NetScaler software without rebooting the underlying operating system)
• To reboot from the GUI,
  • Navigate to System > (On the Right side under "system information") Reboot button

NOTE:- Please note the following points in case of NetScaler is a part of the High Availability

1. Reboot the secondary first and then perform Failover, post failover reboot the other node.
2. Follow the above steps of comparing the configuration in both the nodes to be on safer side.

https://developer-docs.citrix.com/projects/netscaler-command-reference/en/12.0/ns/reboot/reboot/