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System Administration Guide: Advanced Administration     Oracle Solaris 11 Express 11/10
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Document Information


1.  Managing Terminals, Modems and Serial Port Services (Tasks)

2.  Displaying and Changing System Information (Tasks)

3.  Scheduling System Tasks (Tasks)

4.  Managing System Processes (Tasks)

5.  Monitoring System Performance (Tasks)

6.  Troubleshooting Software Problems (Tasks)

7.  Managing Core Files (Tasks)

8.  Managing System Crash Information (Tasks)

9.  Troubleshooting Miscellaneous System Problems (Tasks)

What to Do If Rebooting Fails

What to Do If You Forgot the Root Password

What to Do If a System Hangs

What to Do If a File System Fills Up

File System Fills Up Because a Large File or Directory Was Created

A TMPFS File System Is Full Because the System Ran Out of Memory

What to Do If File ACLs Are Lost After Copy or Restore


What to Do If a System Hangs

A system can freeze or hang rather than crash completely if some software process is stuck. Follow these steps to recover from a hung system.

  1. Determine whether the system is running a window environment and follow these suggestions. If these suggestions do not solve the problem, go to step 2.

    • Make sure the pointer is in the window where you are typing the commands.

    • Press Control-q in case the user accidentally pressed Control-s, which freezes the screen. Control-s freezes only the window, not the entire screen. If a window is frozen, try using another window.

    • If possible, log in remotely from another system on the network. Use the pgrep command to look for the hung process. If it looks like the window system is hung, identify the process and kill it.

  2. Press Control-\ to force a “quit” in the running program and (probably) write out a core file.

  3. Press Control-c to interrupt the program that might be running.

  4. Log in remotely and attempt to identify and kill the process that is hanging the system.

  5. Log in remotely, become root and then reboot the system.

  6. If the system still does not respond, force a crash dump and reboot. For information about forcing a crash dump and booting, see Forcing a Crash Dump and Reboot of the System in System Administration Guide: Basic Administration.

  7. If the system still does not respond, turn the power off, wait a minute or so, then turn the power back on.

  8. If you cannot get the system to respond at all, contact your local service provider for help.