Update cheatsheets

tldr/chisel

@@ -5,7 +5,8 @@ source: https://github.com/tldr-pages/tldr.git
 ---
 # chisel
 
-> Create TCP tunnels. Includes both client and server.
+> Create TCP/UDP tunnels, transported over HTTP, secured via SSH.
+> Includes both client and server in the same `chisel` executable.
 > More information: <https://github.com/jpillora/chisel>.
 
 - Run a Chisel server:
@@ -31,3 +32,11 @@ source: https://github.com/tldr-pages/tldr.git
 - Connect to a Chisel server using username and password authentication:
 
 `chisel client --auth {{username}}:{{password}} {{server_ip}}:{{server_port}} {{local_port}}:{{remote_server}}:{{remote_port}}`
+
+- Initialize a Chisel server in reverse mode on a specific port, also enabling SOCKS5 proxy (on port 1080) functionality:
+
+`chisel server -p {{server_port}} --reverse --socks5`
+
+- Connect to a Chisel server at specific IP and port, creating a reverse tunnel mapped to a local SOCKS proxy:
+
+`chisel client {{server_ip}}:{{server_port}} R:socks`

tldr/pi1toppm

@@ -0,0 +1,14 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pi1toppm
+
+> Convert an Atari Degas PI1 image to a PPM image.
+> See also: `ppmtopi1`.
+> More information: <https://netpbm.sourceforge.net/doc/pi1toppm.html>.
+
+- Convert an Atari Degas PI1 image into PPM image:
+
+`pi1toppm {{path/to/atari_image.pi1}} > {{path/to/image.ppm}}`

tldr/ppmtopi1

@@ -0,0 +1,14 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ppmtopi1
+
+> Convert a PPM image to an Atari Degas PI1 image.
+> See also: `pi1toppm`.
+> More information: <https://netpbm.sourceforge.net/doc/ppmtopi1.html>.
+
+- Convert a PPM image into an Atari Degas PI1 image:
+
+`ppmtopi1 {{path/to/image.ppm}} > {{path/to/output_image.pi1}}`