Update cheatsheets

tldr/chkrootkit

@@ -0,0 +1,41 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# chkrootkit
+
+> Scan system for rootkits.
+> More information: <https://manned.org/chkrootkit>.
+
+- Enable [q]uiet mode and suppress normal test results:
+
+`chkrootkit -q`
+
+- Enable e[x]pert mode and produce additional outputs:
+
+`chkrootkit -x`
+
+- Enable [d]ebug mode to show all output:
+
+`chkrootkit -d`
+
+- Specify [e]xcluded files for some tests:
+
+`chkrootkit -e "{{path/to/file}}"`
+
+- Specify a directory as the [r]oot for testing (e.g. mounted `ext` drives):
+
+`chkrootkit -r {{path/to/directory}}`
+
+- Ignore [n]fs-mounted directories:
+
+`chkrootkit -n`
+
+- Invoke [T]ests and ignore specific filesystem types:
+
+`chkrootkit -T {{filesystemtype}}`
+
+- Generate [l]ist of available tests:
+
+`chkrootkit -l`

tldr/fastapi

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# fastapi
+
+> Run FastAPI apps which uses Uvicorn under the hood.
+> More information: <https://manned.org/fastapi>.
+
+- Run a FastAPI app with automatic reload (for development):
+
+`fastapi run {{path/to/file.py}} --reload`
+
+- Serve your app in both development mode:
+
+`fastapi dev {{path/to/file.py}}`
+
+- Specify the host and port to run on:
+
+`fastapi run {{path/to/file.py}} --host {{host_address}} --port {{port}}`
+
+- Set the app variable name (if not `app`) or specify a custom app directory:
+
+`fastapi run {{path/to/file.py}} --app-dir {{path/to/app}} --app {{custom_app_name}}`
+
+- Display help:
+
+`fastapi --help`
+
+- Display help for a subcommand:
+
+`fastapi {{subcommand}} --help`

tldr/freeramdisk

@@ -0,0 +1,14 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# freeramdisk
+
+> Free memory used by `loadlin` ramdisk on legacy systems.
+> Largely deprecated by `umount`, `losetup`, and `tmpfs`.
+> More information: <https://manned.org/freeramdisk>.
+
+- Free `loadlin` ramdisk memory:
+
+`sudo freeramdisk`

tldr/hexdump

@@ -5,10 +5,11 @@ source: https://github.com/tldr-pages/tldr.git
 ---
 # hexdump
 
-> An ASCII, decimal, hexadecimal, octal dump.
-> More information: <https://manned.org/hexdump>.
+> Display file contents in hexadecimal, decimal, octal, or ASCII.
+> Useful for inspecting dump file, binary data, or debug output.
+> More information: <https://manned.org/man/freebsd/hexdump.1>.
 
-- Print the hexadecimal representation of a file, replacing duplicate lines by '*':
+- Print the hexadecimal representation of a file, replacing duplicate lines by `*`:
 
 `hexdump {{path/to/file}}`
 
@@ -16,10 +17,14 @@ source: https://github.com/tldr-pages/tldr.git
 
 `hexdump -C {{path/to/file}}`
 
-- Display the hexadecimal representation of a file, but interpret only n bytes of the input:
+- Display the hexadecimal representation of a file, but interpret only a specific number of bytes of the input:
 
-`hexdump -C -n{{number_of_bytes}} {{path/to/file}}`
+`hexdump -C -n {{number_of_bytes}} {{path/to/file}}`
 
-- Don't replace duplicate lines with '*':
+- Verbose - no suppression by `*` on duplicate lines:
 
-`hexdump --no-squeezing {{path/to/file}}`
+`hexdump -v {{path/to/file}}`
+
+- Format output using printf-like format string:
+
+`hexdump -e '{{element_format .. end_format}}' {{path/to/file}}`

tldr/linux/fancontrol

@@ -0,0 +1,18 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# fancontrol
+
+> Automated fan speed management.
+> Uses a configuration file to control a wide range of variables.
+> More information: <https://manned.org/fancontrol>.
+
+- Start `fancontrol` using default `/etc/fancontrol` configuration file:
+
+`fancontrol`
+
+- Start `fancontrol` using custom configuration file path:
+
+`fancontrol {{path/to/config_file}}`

tldr/linux/lsdev

@@ -0,0 +1,13 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# lsdev
+
+> Display installed hardware detected in the `/proc` director.
+> More information: <https://manned.org/lsdev>.
+
+- Show list of installed hardware:
+
+`lsdev`

tldr/stress-ng

@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# stress-ng
+
+> Load and stress a Linux system in various ways (CPU, memory, I/O, etc.).
+> Useful for benchmarking, hardware validation, and stability testing.
+> More information: <https://manned.org/stress-ng>.
+
+- Stress all CPUs with 4 workers for 60 seconds:
+
+`stress-ng {{[-c|--cpu]}} 4 {{[-t|--timeout]}} 60s`
+
+- Stress virtual memory with 2 workers for 30 seconds:
+
+`stress-ng {{[-m|--vm]}} 2 --vm-bytes {{512M}} {{[-t|--timeout]}} 30s`
+
+- Stress the I/O subsystem with 3 workers for 45 seconds:
+
+`stress-ng {{[-i|--io]}} 3 {{[-t|--timeout]}} 45s`
+
+- Run all stress tests for 2 minutes:
+
+`stress-ng {{[-a|--all]}} {{1}} {{[-t|--timeout]}} 2m`

tldr/subl

@@ -6,11 +6,11 @@ source: https://github.com/tldr-pages/tldr.git
 # subl
 
 > Sublime Text editor.
-> More information: <https://www.sublimetext.com>.
+> More information: <https://www.sublimetext.com/docs/command_line.html>.
 
 - Open the current directory in Sublime Text:
 
-`subl {{.}}`
+`subl .`
 
 - Open a file or directory in Sublime Text:
 
@@ -22,8 +22,8 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Open a file or directory in the currently open window:
 
-`subl -a {{path/to/file}}`
+`subl {{[-a|--add]}} {{path/to/file_or_directory}}`
 
 - Open a file or directory in a new window:
 
-`subl -n {{path/to/file}}`
+`subl {{[-n|--new-window]}} {{path/to/file_or_directory}}`