Fix fs-squash.md

docs/linux/common.md

@@ -35,6 +35,11 @@ alias m='cd /mnt'
 alias e='cd /etc'
 alias l='cd /var/log'
 
+alias mn='. /root/bin/cmp-mn0'
+
+alias dfc='df -h -x tmpfs -x devtmpfs'
+alias duc='du -d 1 -h'
+
 tabs -4
 ```