Update cheatsheets

tldr/linux/getenforce

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# getenforce
+
+> Get the current mode of SELinux (i.e. enforcing, permissive, or disabled).
+> More information: <https://manned.org/man/getenforce>.
+
+- Display the current mode of SELinux:
+
+`getenforce`

tldr/linux/ipcs

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ipcs
+
+> Show information about the usage of System V IPC facilities: shared memory segments, message queues, and semaphore arrays.
+> See also: `lsipc` for a more flexible tool, `ipcmk` for creating IPC facilities, and `ipcrm` for deleting them.
+> More information: <https://manned.org/ipcs>.
+
+- Show information about all active IPC facilities:
+
+`ipcs`
+
+- Show information about active shared [m]emory segments, message [q]ueues or [s]empahore sets:
+
+`ipcs {{--shmems|--queues|--semaphores}}`
+
+- Show full details on the resource with a specific [i]D:
+
+`ipcs {{--shmems|--queues|--semaphores}} --id {{resource_id}}`
+
+- Show [l]imits in [b]ytes or in a human-readable format:
+
+`ipcs --limits {{--bytes|--human}}`
+
+- Show s[u]mmary about current usage:
+
+`ipcs --summary`
+
+- Show [c]reator's and owner's UIDs and PIDs for all IPC facilities:
+
+`ipcs --creator`
+
+- Show the [p]ID of the last operators for all IPC facilities:
+
+`ipcs --pid`
+
+- Show last access [t]imes for all IPC facilities:
+
+`ipcs --time`

tldr/linux/lsipc

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# lsipc
+
+> Show information on System V IPC facilities currently employed in the system.
+> See also: `ipcs` for the older tool.
+> More information: <https://manned.org/lsipc>.
+
+- Show information about all active IPC facilities:
+
+`lsipc`
+
+- Show information about active shared [m]emory segments, message [q]ueues or [s]empahore sets:
+
+`lsipc {{--shmems|--queues|--semaphores}}`
+
+- Show full details on the resource with a specific [i]D:
+
+`lsipc {{--shmems|--queues|--semaphores}} --id {{resource_id}}`
+
+- Print the given [o]utput columns (see all supported columns with `--help`):
+
+`lsipc --output {{KEY,ID,PERMS,SEND,STATUS,NSEMS,RESOURCE,...}}`
+
+- Use [r]aw, [J]SON, [l]ist or [e]xport (key="value") format:
+
+`lsipc {{--raw|--json|--list|--export}}`
+
+- Don't truncate the output:
+
+`lsipc --notruncate`