Update cheatsheets

tldr/brew-services

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# brew services
+
+> Manage background services with `launchctl` on macOS or `systemctl` on Linux.
+> More information: <https://docs.brew.sh/Manpage#services-subcommand>.
+
+- List all managed services for the current user:
+
+`brew services`
+
+- List more information about all managed services:
+
+`brew services info --all`
+
+- Start a service immediately and register it to launch at login (or boot):
+
+`brew services start {{formula}}`
+
+- Stop the service immediately and unregister it from launching at login (or boot):
+
+`brew services stop {{formula}}`
+
+- Stop (if necessary) and start the service immediately and register it to launch at login (or boot):
+
+`brew services restart {{formula}}`
+
+- Remove all unused services:
+
+`brew services cleanup`

tldr/brew-update

@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > Fetch the newest version of Homebrew and all formulae from GitHub using `git` and perform any necessary migrations.
 > To upgrade all installed formulae, use `brew upgrade`.
-> More information: <https://docs.brew.sh/Manpage#update-options>.
+> More information: <https://docs.brew.sh/Manpage#update-up-options>.
 
 - Fetch the newest version of Homebrew and all formulae:
 

tldr/brew-upgrade

@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # brew upgrade
 
 > Upgrade outdated formulae and casks.
-> More information: <https://docs.brew.sh/Manpage#upgrade-options-outdated_formulaoutdated_cask->.
+> More information: <https://docs.brew.sh/Manpage#upgrade-options-installed_formulainstalled_cask->.
 
 - Upgrade all outdated casks and formulae:
 

tldr/zmap

@@ -0,0 +1,41 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# zmap
+
+> Fast, open-source network scanner for Internet-wide surveys.
+> More information: <https://github.com/zmap/zmap>.
+
+- Scan a subnet or full IPv4 space for a specific TCP port (default: 80):
+
+`zmap {{SUBNETS}} -p {{port}}`
+
+- Scan specific ports or port ranges across a subnet:
+
+`zmap {{--target-ports}} {{port1,port2-port3,...}} {{SUBNETS}}`
+
+- Output results to a CSV file with custom fields:
+
+`zmap {{[-o|--output-file]}} {{path/to/output_file.csv}} {{[-f|--output-fields]}} "{{saddr,daddr,sport,dport}}" {{SUBNETS}}`
+
+- Limit the scan rate to a specific number of packets per second:
+
+`zmap {{[-r|--rate]}} {{packets_per_second}} {{SUBNETS}}`
+
+- Perform a dry run without sending packets:
+
+`zmap {{[-d|--dryrun]}} {{SUBNETS}}`
+
+- Exclude subnets using a blocklist file in CIDR notation:
+
+`zmap {{[-b|--blocklist-file]}} {{path/to/blocklist.txt}} {{SUBNETS}}`
+
+- Set a specific source IP for scan packets:
+
+`zmap {{[-S|--source-ip]}} {{source_ip}} {{SUBNETS}}`
+
+- Cap the number/percentage of targets to probe (e.g. 1000 IP/port pairs):
+
+`zmap {{[-n|--max-targets]}} {{1000}} {{SUBNETS}} {{[-p|--target-ports]}} {{port1,port2-port3}}`