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tech:computers:os:linux [2022/11/07 17:06] – created alephalpha0tech:computers:os:linux [2022/11/07 18:03] (current) – removed alephalpha0
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-====== *Nixs ====== 
  
-== Magic SysRq Key == 
-''The Decent Way To Reboot Frozen Kernels.'' 
- 
-  - First, the option within the kernel needs to be turned on. 
-    - ''sudo sh -c "echo \"1\" > /proc/sys/kernel/sysrq"'' 
-  - Then; the sequence **R** .. **E** .. **K** .. **S** .. **U** .. **B** can be typed slowly while holding ''ALT'' + ''SysRq''  
- 
-== List of SysRq Command Keys  ==  
-Following are the command keys available for Alt+SysRq+commandkey.(( Source: https://linux.101hacks.com/sysadmin-tasks/magic-sysrq-key/)) 
- 
- 
-  * **‘k’ – Kills all the process running on the current virtual console.**  
-  * **’s’ – This will attempt to sync all the mounted file system.** 
-  * ‘b’ – Immediately reboot the system, without unmounting partitions or syncing. 
-  * **‘e’ – Sends SIGTERM to all process except init.** 
-  * ‘m’ – Output current memory information to the console. 
-  * **‘i’ – Send the SIGKILL signal to all processes except init** 
-  * ‘r’ – Switch the keyboard from raw mode (the mode used by programs such as X11), to XLATE mode. 
-  * **’s’ – sync all mounted file system.** 
-  * ‘t’ – Output a list of current tasks and their information to the console. 
-  * ‘u’ – Remount all mounted filesystems in readonly mode. 
-  * ‘o’ – Shutdown the system immediately. 
-  * ‘p’ – Print the current registers and flags to the console. 
-  * ‘0-9′ – Sets the console log level, controlling which kernel messages will be printed to your console. 
-  * **‘f’ – Will call oom_kill to kill process which takes more memory.** 
-  * ‘h’ – Used to display the help. But any other keys than the above listed will print help.