Update cheatsheets

tldr/linux/blockdev

@@ -0,0 +1,41 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# blockdev
+
+> Manage, query, and manipulate block devices.
+> More information: <https://manned.org/blockdev>.
+
+- Print a report for all devices:
+
+`sudo blockdev --report`
+
+- Print a report for a specific device:
+
+`sudo blockdev --report {{/dev/sdXY}}`
+
+- Get the size of a device in 512-byte sectors:
+
+`sudo blockdev --getsz {{/dev/sdXY}}`
+
+- Set read-only:
+
+`sudo blockdev --setro {{/dev/sdXY}}`
+
+- Set read-write:
+
+`sudo blockdev --setrw {{/dev/sdXY}}`
+
+- Flush buffers:
+
+`sudo blockdev --flushbufs {{/dev/sdXY}}`
+
+- Get the physical block size:
+
+`sudo blockdev --getpbsz {{/dev/sdXY}}`
+
+- Set the read-ahead value to 128 sectors:
+
+`sudo blockdev --setra 128 {{/dev/sdXY}}`

tldr/linux/qm

@@ -6,6 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # qm
 
 > QEMU/KVM Virtual Machine Manager.
+> Some subcommands such as `list`, `start`, `stop`, `clone`, etc. have their own usage documentation.
 > More information: <https://pve.proxmox.com/pve-docs/qm.1.html>.
 
 - List all virtual machines:

tldr/linux/qmrestore

@@ -5,7 +5,7 @@ source: https://github.com/tldr-pages/tldr.git
 ---
 # qmrestore
 
-> Restore QemuServer vzdump backups.
+> Restore QemuServer `vzdump` backups.
 > More information: <https://pve.proxmox.com/pve-docs/qmrestore.1.html>.
 
 - Restore virtual machine from given backup file on the original storage:

tldr/linux/waydroid

@@ -30,7 +30,11 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Manage the Waydroid container:
 
-`waydroid container {{start|stop|restart|freeze|unfreeze}}`
+`sudo waydroid container {{start|stop|restart|freeze|unfreeze}}`
+
+- Open Waydroid shell:
+
+`sudo waydroid shell`
 
 - Adjust Waydroid window dimensions: