Update cheatsheets

tldr/linux/check-language-support

@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # check-language-support
 
 > Display a list of missing language packages on Ubuntu.
-> More information: <https://manpages.ubuntu.com/manpages/latest/man1/check-language-support.html>.
+> More information: <https://manned.org/check-language-support>.
 
 - Display a list of missing language packages based on installed software and enabled locales:
 

tldr/linux/dnf-config-manager

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dnf config-manager
+
+> Manage DNF configuration options and repositories on Fedora-based systems.
+> More information: <https://manned.org/dnf-config-manager>.
+
+- Add (and enable) a repository from a URL:
+
+`dnf config-manager --add-repo={{repository_url}}`
+
+- Print current configuration values:
+
+`dnf config-manager --dump`
+
+- Enable a specific repository:
+
+`dnf config-manager --set-enabled {{repository_id}}`
+
+- Disable specified repositories:
+
+`dnf config-manager --set-disabled {{repository_id1 repository_id2 ...}}`
+
+- Set a configuration option for a repository:
+
+`dnf config-manager --setopt={{option}}={{value}}`
+
+- Display help:
+
+`dnf config-manager --help-cmd`

tldr/linux/do-release-upgrade

@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # do-release-upgrade
 
 > The Ubuntu release upgrader.
-> More information: <https://ubuntu.com/server/docs/upgrade-introduction>.
+> More information: <https://manned.org/do-release-upgrade.8>.
 
 - Upgrade to the latest release:
 

tldr/linux/duc

@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > A collection of tools for indexing, inspecting and visualizing disk usage.
 > Duc maintains a database of accumulated sizes of directories in the file system, allowing to query this database, or creating fancy graphs to show where data is.
-> More information: <https://duc.zevv.nl/>.
+> More information: <http://duc.zevv.nl>.
 
 - Index the `/usr` directory, writing to the default database location `~/.duc.db`:
 

tldr/linux/gpclient

@@ -0,0 +1,37 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# gpclient
+
+> Connect to a GlobalProtect VPN on Linux via OpenConnect.
+> More information: <https://github.com/yuezk/GlobalProtect-openconnect>.
+
+- Connect to a GlobalProtect VPN using a portal server:
+
+`gpclient connect {{vpn_gateway_url}}`
+
+- Disconnect from the currently connected VPN server:
+
+`gpclient disconnect`
+
+- Launch the graphical user interface (GUI) for VPN management:
+
+`gpclient launch-gui`
+
+- Use OpenSSL workaround to bypass legacy renegotiation errors:
+
+`gpclient connect --fix-openssl {{vpn_gateway_url}}`
+
+- Ignore TLS errors during connection:
+
+`gpclient connect --ignore-tls-errors {{vpn_gateway_url}}`
+
+- Display version:
+
+`gpclient --version`
+
+- Display help for any command:
+
+`gpclient help {{command}}`

tldr/linux/pro

@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # pro
 
 > Manage Ubuntu Pro services.
-> More information: <https://manpages.ubuntu.com/manpages/latest/man1/ubuntu-advantage.1.html>.
+> More information: <https://manned.org/ubuntu-advantage.1>.
 
 - Connect your system to the Ubuntu Pro support contract:
 

tldr/linux/virt-manager

@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # virt-manager
 
 > A desktop user interface for managing KVM and Xen virtual machines and LXC containers.
-> More information: <https://manpages.ubuntu.com/manpages/man1/virt-manager.1.html>.
+> More information: <https://manned.org/virt-manager.1>.
 
 - Launch the GUI:
 

tldr/linux/yum-config-manager

@@ -0,0 +1,12 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# yum config-manager
+
+> This command is an alias of `dnf config-manager`.
+
+- View documentation for the original command:
+
+`tldr dnf config-manager`