Update cheatsheets

tldr/createdb

@@ -14,8 +14,8 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Create a database owned by a specific user with a description:
 
-`createdb --owner {{username}} {{database_name}} '{{description}}'`
+`createdb {{[-O|--owner]}} {{username}} {{database_name}} '{{description}}'`
 
 - Create a database from a template:
 
-`createdb --template {{template_name}} {{database_name}}`
+`createdb {{[-T|--template]}} {{template_name}} {{database_name}}`

tldr/git-fetch

@@ -27,3 +27,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Delete local references to remote branches that have been deleted upstream:
 
 `git fetch {{[-p|--prune]}}`
+
+- Deepen current shallow branch by 2 commits:
+
+`git fetch --deepen 2`

tldr/linux/lvscan

@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# lvscan
+
+> Scan (list) all logical volumes in the system.
+> Part of the LVM (Logical Volume Manager) suite.
+> More information: <https://manned.org/lvscan>.
+
+- List all logical volumes:
+
+`lvscan`
+
+- List only active logical volumes:
+
+`lvscan --active`
+
+- List only inactive logical volumes:
+
+`lvscan --inactive`
+
+- Display logical volumes in JSON format:
+
+`lvscan --reportformat json`

tldr/linux/xdp-filter

@@ -0,0 +1,34 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# xdp-filter
+
+> Load and manage an eBPF XDP packet filter.
+> Part of the xdp-tools collection.
+> More information: <https://github.com/xdp-project/xdp-tools/tree/main/xdp-filter#running-xdp-filter>.
+
+- Load the filter on an interface in skb (generic) mode with default allow policy:
+
+`sudo xdp-filter load {{[-p|--policy]}} allow {{[-m|--mode]}} skb {{network_interface}}`
+
+- Unload the filter from an interface:
+
+`sudo xdp-filter unload {{network_interface}}`
+
+- Deny traffic to a specific destination port:
+
+`sudo xdp-filter port {{destination_port}}`
+
+- Deny traffic from a specific source IP address:
+
+`sudo xdp-filter ip {{[-m|--mode]}} src {{source_ip}}`
+
+- Deny traffic from a specific source MAC address:
+
+`sudo xdp-filter ether {{[-m|--mode]}} src {{mac_address}}`
+
+- Poll packets and show statistics every 10000 milliseconds:
+
+`sudo xdp-filter poll {{[-i|--interval]}} 10000`

tldr/psql

@@ -26,4 +26,4 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Execute commands from a file on the given database:
 
-`psql {{database}} {{[-f|--file]}} {{file.sql}}`
+`psql {{database}} {{[-f|--file]}} {{path/to/file.sql}}`

tldr/rdiff-backup

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rdiff-backup
+
+> Local/remote mirror and incremental backup tool.
+> More information: <https://rdiff-backup.net/rdiff-backup.1.html>.
+
+- Back up `path/to/source` to `path/to/backup`:
+
+`rdiff-backup backup {{path/to/source}} {{path/to/backup}}`
+
+- List incremental backups in repository (location path, local or remote):
+
+`rdiff-backup list increments {{repository}}`
+
+- Restore from most recent backup:
+
+`rdiff-backup restore {{path/to/backup}} {{path/to/destination}}`
+
+- Restore backed up files as they were 3 days ago:
+
+`rdiff-backup restore --at 3D  {{path/to/backup}} {{path/to/destination}}`