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| Filename | /etc/sysctl.d/10-magic-sysrq.conf |
| Size | 1.16 kb |
| Permission | rw-r--r-- |
| Owner | root : root |
| Create time | 27-Apr-2025 09:50 |
| Last modified | 07-Jan-2014 07:32 |
| Last accessed | 05-Jul-2025 11:25 |
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# The magic SysRq key enables certain keyboard combinations to be
# interpreted by the kernel to help with debugging. The kernel will respond
# to these keys regardless of the current running applications.
#
# In general, the magic SysRq key is not needed for the average Ubuntu
# system, and having it enabled by default can lead to security issues on
# the console such as being able to dump memory or to kill arbitrary
# processes including the running screen lock.
#
# Here is the list of possible values:
# 0 - disable sysrq completely
# 1 - enable all functions of sysrq
# >1 - enable certain functions by adding up the following values:
# 2 - enable control of console logging level
# 4 - enable control of keyboard (SAK, unraw)
# 8 - enable debugging dumps of processes etc.
# 16 - enable sync command
# 32 - enable remount read-only
# 64 - enable signalling of processes (term, kill, oom-kill)
# 128 - allow reboot/poweroff
# 256 - allow nicing of all RT tasks
#
# For example, to enable both control of console logging level and
# debugging dumps of processes: kernel.sysrq = 10
#
kernel.sysrq = 176
# interpreted by the kernel to help with debugging. The kernel will respond
# to these keys regardless of the current running applications.
#
# In general, the magic SysRq key is not needed for the average Ubuntu
# system, and having it enabled by default can lead to security issues on
# the console such as being able to dump memory or to kill arbitrary
# processes including the running screen lock.
#
# Here is the list of possible values:
# 0 - disable sysrq completely
# 1 - enable all functions of sysrq
# >1 - enable certain functions by adding up the following values:
# 2 - enable control of console logging level
# 4 - enable control of keyboard (SAK, unraw)
# 8 - enable debugging dumps of processes etc.
# 16 - enable sync command
# 32 - enable remount read-only
# 64 - enable signalling of processes (term, kill, oom-kill)
# 128 - allow reboot/poweroff
# 256 - allow nicing of all RT tasks
#
# For example, to enable both control of console logging level and
# debugging dumps of processes: kernel.sysrq = 10
#
kernel.sysrq = 176