added sysrq-trigger

sheets/sysrq-trigger

@@ -0,0 +1,29 @@
+# The "magic SysRq key" provides a way to send commands
+# directly to the kernel through the /proc filesystem
+# kernel documentation: https://www.mjmwired.net/kernel/Documentation/sysrq.txt
+# using keyboard: Alt-SyqRq-KEY
+
+# activate the magic SysRq option (root)
+echo 1 > /proc/sys/kernel/sysrq
+
+# activate the magic SysRq option (sudo)
+echo 1 | suto tee /proc/sys/kernel/sysrq
+
+# permanently activate sysrq
+echo "kernel.sysrq = 1" >> /etc/sysctl.conf
+
+# 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.