Update cheatsheets

tldr/arjun

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# arjun
+
+> Discover HTTP parameters for web applications.
+> More information: <https://github.com/s0md3v/Arjun/wiki/Usage>.
+
+- Scan a URL for GET parameters:
+
+`arjun -u {{https://example.com/page.php}}`
+
+- Scan using POST method:
+
+`arjun -u {{https://example.com/api}} -m POST`
+
+- Save discovered parameters to a JSON file:
+
+`arjun -u {{https://example.com}} -o {{path/to/output.json}}`
+
+- Use a custom wordlist:
+
+`arjun -u {{https://example.com}} -w {{path/to/wordlist.txt}}`
+
+- Increase request delay by specific amount of seconds to avoid rate limiting:
+
+`arjun -u {{https://example.com}} -d {{2}}`

tldr/bfs

@@ -10,32 +10,32 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Find files by extension:
 
-`bfs {{root_path}} -name '{{*.ext}}'`
+`bfs {{path/to/directory}} -name '{{*.ext}}'`
 
 - Find files matching multiple path/name patterns:
 
-`bfs {{root_path}} -path '{{**/path/**/*.ext}}' -or -name '{{*pattern*}}'`
+`bfs {{path/to/directory}} -path '{{**/path/**/*.ext}}' -or -name '{{*pattern*}}'`
 
 - Find directories matching a given name, in case-insensitive mode:
 
-`bfs {{root_path}} -type d -iname '{{*lib*}}'`
+`bfs {{path/to/directory}} -type d -iname '{{*lib*}}'`
 
 - Find files matching a given pattern, excluding specific paths:
 
-`bfs {{root_path}} -name '{{*.py}}' -not -path '{{*/site-packages/*}}'`
+`bfs {{path/to/directory}} -name '{{*.py}}' -not -path '{{*/site-packages/*}}'`
 
 - Find files matching a given size range, limiting the recursive depth to "1":
 
-`bfs {{root_path}} -maxdepth 1 -size {{+500k}} -size {{-10M}}`
+`bfs {{path/to/directory}} -maxdepth 1 -size {{+500k}} -size {{-10M}}`
 
 - Run a command for each file (use `{}` within the command to access the filename):
 
-`bfs {{root_path}} -name '{{*.ext}}' -exec {{wc -l}} {} \;`
+`bfs {{path/to/directory}} -name '{{*.ext}}' -exec {{wc -l}} {} \;`
 
 - Find all files modified today and pass the results to a single command as arguments:
 
-`bfs {{root_path}} -daystart -mtime {{-1}} -exec {{tar -cvf archive.tar}} {} \+`
+`bfs {{path/to/directory}} -daystart -mtime {{-1}} -exec {{tar -cvf archive.tar}} {} \+`
 
 - Find empty files (0 byte) or directories and delete them verbosely:
 
-`bfs {{root_path}} -type {{f|d}} -empty -delete -print`
+`bfs {{path/to/directory}} -type {{f|d}} -empty -delete -print`

tldr/find

@@ -11,32 +11,32 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Find files by extension:
 
-`find {{root_path}} -name '{{*.ext}}'`
+`find {{path/to/directory}} -name '{{*.ext}}'`
 
 - Find files matching multiple path/name patterns:
 
-`find {{root_path}} -path '{{*/path/*/*.ext}}' -or -name '{{*pattern*}}'`
+`find {{path/to/directory}} -path '{{*/path/*/*.ext}}' -or -name '{{*pattern*}}'`
 
 - Find directories matching a given name, in case-insensitive mode:
 
-`find {{root_path}} -type d -iname '{{*lib*}}'`
+`find {{path/to/directory}} -type d -iname '{{*lib*}}'`
 
 - Find files matching a given pattern, excluding specific paths:
 
-`find {{root_path}} -name '{{*.py}}' -not -path '{{*/site-packages/*}}'`
+`find {{path/to/directory}} -name '{{*.py}}' -not -path '{{*/site-packages/*}}'`
 
 - Find files matching a given size range, limiting the recursive depth to "1":
 
-`find {{root_path}} -maxdepth 1 -size {{+500k}} -size {{-10M}}`
+`find {{path/to/directory}} -maxdepth 1 -size {{+500k}} -size {{-10M}}`
 
 - Run a command for each file (use `{}` within the command to access the filename):
 
-`find {{root_path}} -name '{{*.ext}}' -exec {{wc -l}} {} \;`
+`find {{path/to/directory}} -name '{{*.ext}}' -exec {{wc -l}} {} \;`
 
 - Find all files modified today and pass the results to a single command as arguments:
 
-`find {{root_path}} -daystart -mtime {{-1}} -exec {{tar -cvf archive.tar}} {} \+`
+`find {{path/to/directory}} -daystart -mtime {{-1}} -exec {{tar -cvf archive.tar}} {} \+`
 
 - Search for either empty files or directories and delete them verbosely:
 
-`find {{root_path}} -type {{f|d}} -empty -delete -print`
+`find {{path/to/directory}} -type {{f|d}} -empty -delete -print`

tldr/linux/apptainer-search

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# apptainer search
+
+> Search a Container Library for container images.
+> More information: <https://apptainer.org/docs/user/main/cli/apptainer_search.html>.
+
+- Search for container images matching a query:
+
+`apptainer search {{query}}`
+
+- Search for container images for a specific architecture:
+
+`apptainer search --arch {{amd64|arm64|386|ppc64le|s390x}} {{query}}`
+
+- Search for only signed container images:
+
+`apptainer search --signed {{query}}`
+
+- Search in a specific Container Library:
+
+`apptainer search --library {{library_url}} {{query}}`
+
+- Display help:
+
+`apptainer search {{[-h|--help]}}`

tldr/linux/apptainer-sign

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# apptainer sign
+
+> Add digital signatures to a SIF container image.
+> More information: <https://apptainer.org/docs/user/main/cli/apptainer_sign.html>.
+
+- Sign a container image using the default PGP key:
+
+`apptainer sign {{path/to/image.sif}}`
+
+- Sign a container image using a specific private key file:
+
+`apptainer sign --key {{path/to/private.pem}} {{path/to/image.sif}}`
+
+- Sign a container image using a specific PGP key index:
+
+`apptainer sign {{[-k|--keyidx]}} {{key_index}} {{path/to/image.sif}}`
+
+- Sign a specific object group within the image:
+
+`apptainer sign {{[-g|--group-id]}} {{group_id}} {{path/to/image.sif}}`
+
+- Sign a specific object by ID within the image:
+
+`apptainer sign {{[-i|--sif-id]}} {{object_id}} {{path/to/image.sif}}`
+
+- Display help:
+
+`apptainer sign {{[-h|--help]}}`

tldr/linux/gio

@@ -28,3 +28,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Send a file to the trash (reversible):
 
 `gio trash {{path/to/file}}`
+
+- Launch an application from a `.desktop` file:
+
+`gio launch {{path/to/file}}.desktop`

tldr/linux/systemctl-mask

@@ -5,7 +5,7 @@ source: https://github.com/tldr-pages/tldr.git
 ---
 # systemctl mask
 
-> Link units to `/dev/null` so that they can be even started.
+> Link units to `/dev/null` so that they cannot be started.
 > More information: <https://www.freedesktop.org/software/systemd/man/systemctl.html#mask%20UNIT%E2%80%A6>.
 
 - Mask a service:

tldr/massdns

@@ -0,0 +1,34 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# massdns
+
+> Resolve DNS records in bulk with high performance for reconnaissance.
+> See also: `dig`, `dnsx`.
+> More information: <https://github.com/blechschmidt/massdns#usage>.
+
+- Resolve `A` records for domains in a file using specified resolvers:
+
+`massdns {{[-r|--resolvers]}} {{path/to/resolvers.txt}} {{path/to/domains.txt}}`
+
+- Resolve a specific record type and write results to a file:
+
+`massdns {{[-r|--resolvers]}} {{path/to/resolvers.txt}} {{[-t|--type]}} {{A|AAAA|NS|MX|TXT}} {{[-w|--outfile]}} {{path/to/output.txt}} {{path/to/domains.txt}}`
+
+- Resolve domains with simple text output format:
+
+`massdns {{[-r|--resolvers]}} {{path/to/resolvers.txt}} {{[-o|--output]}} S {{path/to/domains.txt}}`
+
+- Resolve domains with JSON output format:
+
+`massdns {{[-r|--resolvers]}} {{path/to/resolvers.txt}} {{[-o|--output]}} J {{path/to/domains.txt}}`
+
+- Resolve domains with a custom number of concurrent lookups:
+
+`massdns {{[-r|--resolvers]}} {{path/to/resolvers.txt}} {{[-s|--hashmap-size]}} {{10000}} {{path/to/domains.txt}}`
+
+- Resolve domains in quiet mode, suppressing status output:
+
+`massdns {{[-r|--resolvers]}} {{path/to/resolvers.txt}} {{[-q|--quiet]}} {{path/to/domains.txt}}`

tldr/npm-completion

@@ -12,11 +12,11 @@ source: https://github.com/tldr-pages/tldr.git
 
 `npm completion`
 
-- Add completion to your shell profile (Bash):
+- Add completion to the shell profile (Bash):
 
 `npm completion >> ~/.bashrc`
 
-- Add completion to your shell profile (Zsh):
+- Add completion to the shell profile (Zsh):
 
 `npm completion >> ~/.zshrc`
 

tldr/showmount

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# showmount
+
+> Display mount information for an NFS server.
+> More information: <https://manned.org/showmount>.
+
+- Show clients currently mounting from the server:
+
+`showmount {{hostname}}`
+
+- Show the NFS server's export list:
+
+`showmount {{[-e|--exports]}} {{hostname}}`
+
+- Show all clients and their mounted directories:
+
+`showmount {{[-a|--all]}} {{hostname}}`
+
+- Show only the directories mounted by clients:
+
+`showmount {{[-d|--directories]}} {{hostname}}`
+
+- Show the export list without headers:
+
+`showmount {{[-e|--exports]}} --no-headers {{hostname}}`
+
+- Display help:
+
+`showmount {{[-h|--help]}}`

tldr/sipcalc

@@ -0,0 +1,34 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sipcalc
+
+> Calculate IP subnet information for IPv4 and IPv6 addresses.
+> See also: `ipcalc`.
+> More information: <https://manned.org/sipcalc>.
+
+- Display subnet information for an IPv4 CIDR address:
+
+`sipcalc {{192.168.1.0/24}}`
+
+- Display all available information for an address:
+
+`sipcalc {{[-a|--all]}} {{192.168.1.0/24}}`
+
+- Split an IPv4 network into subnets of a specified mask:
+
+`sipcalc {{[-s|--v4split]}} {{255.255.255.128}} {{192.168.1.0/24}}`
+
+- Display IPv6 reverse DNS information:
+
+`sipcalc {{[-r|--v6rev]}} {{2001:db8::/32}}`
+
+- Enable DNS name resolution:
+
+`sipcalc {{[-d|--resolve]}} {{192.168.1.0/24}}`
+
+- Display help:
+
+`sipcalc {{[-h|--help]}}`

tldr/squid

@@ -0,0 +1,37 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# squid
+
+> Cache and forward HTTP requests through a proxy server.
+> More information: <https://manned.org/squid>.
+
+- Start Squid in the background:
+
+`sudo squid`
+
+- Start Squid in the foreground:
+
+`sudo squid -N`
+
+- Start Squid with a specific configuration file:
+
+`sudo squid -f {{path/to/squid.conf}}`
+
+- Test the configuration file for errors:
+
+`sudo squid -k parse`
+
+- Reload the configuration file:
+
+`sudo squid -k reconfigure`
+
+- Shut down Squid gracefully:
+
+`sudo squid -k shutdown`
+
+- Rotate the log files:
+
+`sudo squid -k rotate`