Update cheatsheets

tldr/linux/journalctl

@@ -22,7 +22,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Show all messages by a specific [u]nit:
 
-`journalctl -u {{unit}}`
+`journalctl --unit {{unit}}`
 
 - Show logs for a given unit since the last time it started:
 

tldr/linux/mkfs.erofs

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mkfs.erofs
+
+> Create an EROFS filesystem in an image.
+> More information: <https://erofs.docs.kernel.org/en/latest/>.
+
+- Create an EROFS filesystem based on the root directory:
+
+`mkfs.erofs image.erofs root/`
+
+- Create an EROFS image with a specific UUID:
+
+`mkfs.erofs -U {{UUID}} image.erofs root/`
+
+- Create a compressed EROFS image:
+
+`mkfs.erofs -zlz4hc image.erofs root/`
+
+- Create an EROFS image where all files are owned by root:
+
+`mkfs.erofs --all-root image.erofs root/`