linux/f*: add option placeholders and mnemonics (#16998)

pages/linux/fakeroot.md

@@ -11,7 +11,7 @@
 
 `fakeroot -- {{command}} {{command_arguments}}`
 
-- Run a command as fakeroot and save the environment to a file on exit:
+- Run a command as fakeroot and [s]ave the environment to a file on exit:
 
 `fakeroot -s {{path/to/file}} -- {{command}} {{command_arguments}}`
 

pages/linux/flameshot.md

@@ -2,7 +2,7 @@
 
 > Screenshot utility with a GUI.
 > Supports basic image editing, such as text, shapes, colors, and imgur.
-> More information: <https://flameshot.org>.
+> More information: <https://flameshot.org/docs/advanced/commandline-options/>.
 
 - Create a fullscreen screenshot:
 

pages/linux/fprintd-verify.md

@@ -25,4 +25,4 @@
 
 - Display help:
 
-`fprintd-verify --help`
+`fprintd-verify {{[-h|--help]}}`

pages/linux/fsck.md

@@ -11,6 +11,6 @@
 
 `sudo fsck -r {{/dev/sdXN}}`
 
-- Check filesystem `/dev/sdXN`, reporting any damaged blocks and automatically repairing them:
+- Check filesystem `/dev/sdXN`, reporting any damaged blocks and [a]utomatically repairing them:
 
 `sudo fsck -a {{/dev/sdXN}}`

pages/linux/fuser.md

@@ -9,20 +9,20 @@
 
 - Show more fields (`USER`, `PID`, `ACCESS` and `COMMAND`):
 
-`fuser --verbose {{path/to/file_or_directory}}`
+`fuser {{[-v|--verbose]}} {{path/to/file_or_directory}}`
 
 - Identify processes using a TCP socket:
 
-`fuser --namespace tcp {{port}}`
+`fuser {{[-n|--namespace]}} tcp {{port}}`
 
 - Kill all processes accessing a file or directory (sends the `SIGKILL` signal):
 
-`fuser --kill {{path/to/file_or_directory}}`
+`fuser {{[-k|--kill]}} {{path/to/file_or_directory}}`
 
 - Find which processes are accessing the filesystem containing a specific file or directory:
 
-`fuser --mount {{path/to/file_or_directory}}`
+`fuser {{[-m|--mount]}} {{path/to/file_or_directory}}`
 
 - Kill all processes with a TCP connection on a specific port:
 
-`fuser --kill {{port}}/tcp`
+`fuser {{[-k|--kill]}} {{port}}/tcp`