Update cheatsheets

tldr/linux/certtool

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# certtool
+
+> Generate and manage X.509 certificates, keys, and PKI structures using GnuTLS.
+> More information: <https://gnutls.org/manual/gnutls.html#certtool-Invocation>.
+
+- Generate a private key and save it to a file:
+
+`certtool {{[-p|--generate-privkey]}} --outfile {{path/to/private.key}}`
+
+- Generate a self-signed certificate using a private key and a template file:
+
+`certtool {{[-s|--generate-self-signed]}} --load-privkey {{path/to/private.key}} --template {{path/to/info.template}} --outfile {{path/to/certificate.crt}}`
+
+- Generate a certificate signing request (CSR):
+
+`certtool {{[-q|--generate-request]}} --load-privkey {{path/to/private.key}} --template {{path/to/info.template}} --outfile {{path/to/request.csr}}`
+
+- Generate a certificate authority (CA) certificate:
+
+`certtool {{[-s|--generate-self-signed]}} --load-privkey {{path/to/ca.key}} --template {{path/to/ca.template}} --outfile {{path/to/ca.crt}}`
+
+- Verify a certificate against a CA certificate:
+
+`certtool --verify --infile {{path/to/certificate.crt}} --load-ca-certificate {{path/to/ca.crt}}`

tldr/linux/cmus

@@ -8,9 +8,9 @@ source: https://github.com/tldr-pages/tldr.git
 > Command-line Music Player.
 > Use `<ArrowKeys>` to navigate, `<Enter>` to select, and numbers `<1>`-`<8>` switch between different views.
 > See also: `ncmpcpp`, `clementine`, `qmmp`.
-> More information: <https://cmus.github.io>.
+> More information: <https://manned.org/cmus>.
 
-- Open cmus into the specified directory (this will become your new working directory):
+- Open `cmus` into the specified directory (this will become your new working directory):
 
 `cmus {{path/to/directory}}`
 
@@ -18,6 +18,14 @@ source: https://github.com/tldr-pages/tldr.git
 
 `<:>add {{path/to/file_or_directory}}`
 
+- Refresh the metadata of songs in the library:
+
+`<:>update-cache`
+
+- Search for songs, albums, or artists:
+
+`</>{{something}}`
+
 - Pause/unpause current song:
 
 `<c>`
@@ -26,6 +34,6 @@ source: https://github.com/tldr-pages/tldr.git
 
 `<s>`
 
-- Quit cmus:
+- Quit `cmus`:
 
 `<q>`

tldr/linux/pirut

@@ -0,0 +1,14 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pirut
+
+> Graphical frontend for `yum`.
+> See also: `yum`.
+> More information: <https://manned.org/pirut>.
+
+- Launch `pirut`:
+
+`pirut`

tldr/linux/pw-link

@@ -10,7 +10,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 - List all audio output and input ports with their IDs:
 
-`pw-link {{[-oiI|--output --input --ids]}}`
+`pw-link {{[-oiI|--output --input --id]}}`
 
 - Create a link between an output and an input port:
 
@@ -22,7 +22,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 - List all links with their IDs:
 
-`pw-link {{[-lI|--links --ids]}}`
+`pw-link {{[-lI|--links --id]}}`
 
 - Display help: