Update cheatsheets

tldr/nnn

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# nnn
+
+> Interactive terminal file manager and disk usage analyzer.
+> More information: <https://github.com/jarun/nnn>.
+
+- Open the current directory (or specify one as the first argument):
+
+`nnn`
+
+- Start in detailed mode:
+
+`nnn -d`
+
+- Show hidden files:
+
+`nnn -H`
+
+- Open an existing bookmark (defined in the `NNN_BMS` environment variable):
+
+`nnn -b {{bookmark_name}}`
+
+- Sort files on [a]pparent disk usage / [d]isk usage / [e]xtension / [r]everse / [s]ize / [t]ime / [v]ersion:
+
+`nnn -T {{a|d|e|r|s|t|v}}`

tldr/nxc-ssh

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# nxc ssh
+
+> Pentest and exploit SSH servers.
+> See also: `hydra`.
+> More information: <https://www.netexec.wiki/ssh-protocol>.
+
+- Spray the specified [p]assword against a list of [u]sernames on the specified target:
+
+`nxc ssh {{192.168.178.2}} -u {{path/to/usernames.txt}} -p {{password}}`
+
+- Search for valid credentials by trying out every combination in the specified lists of [u]sernames and [p]asswords:
+
+`nxc ssh {{192.168.178.2}} -u {{path/to/usernames.txt}} -p {{path/to/passwords.txt}}`
+
+- Use the specified private key for authentication, using the supplied [p]assword as the key's passphrase:
+
+`nxc ssh {{192.186.178.2}} -u {{path/to/usernames.txt}} -p {{password}} --key-file {{path/to/id_rsa}}`
+
+- Try a combination of [u]sername and [p]assword on a number of targets:
+
+`nxc ssh {{192.168.178.0/24}} -u {{username}} -p {{password}}`
+
+- Check for `sudo` privileges on a successful login:
+
+`nxc ssh {{192.168.178.2}} -u {{username}} -p {{path/to/passwords.txt}} --sudo-check`