Update cheatsheets

tldr/du

@@ -31,3 +31,7 @@ source: https://github.com/tldr-pages/tldr.git
 - List the human-readable size of all `.jpg` files in subdirectories of the current directory, and show a cumulative total at the end:
 
 `du -ch {{*/*.jpg}}`
+
+- List all files and directories (including hidden ones) above a certain [t]hreshold size (useful for investigating what is actually taking up the space):
+
+`du --all --human-readable --threshold {{1G|1024M|1048576K}} .[^.]* *`

tldr/linux/ntpd

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ntpd
+
+> The official NTP (Network Time Protocol) daemon to synchronize the system clock to remote time servers or local reference clocks.
+> More information: <https://manned.org/ntpd>.
+
+- Start the daemon:
+
+`sudo ntpd`
+
+- Synchronize system time with remote servers a single time (quit after synchronizing):
+
+`sudo ntpd --quit`
+
+- Synchronize a single time allowing "Big" adjustments:
+
+`sudo ntpd --panicgate --quit`

tldr/type

@@ -6,16 +6,21 @@ source: https://github.com/tldr-pages/tldr.git
 # type
 
 > Display the type of command the shell will execute.
+> Note: all examples are not POSIX compliant.
 > More information: <https://manned.org/type>.
 
 - Display the type of a command:
 
 `type {{command}}`
 
-- Display all locations containing the specified executable:
+- Display all locations containing the specified executable (works only in Bash/fish/Zsh shells):
 
 `type -a {{command}}`
 
-- Display the name of the disk file that would be executed:
+- Display the name of the disk file that would be executed (works only in Bash/fish/Zsh shells):
 
 `type -p {{command}}`
+
+- Display the type of a specific command, alias/keyword/function/builtin/file (works only in Bash/fish shells):
+
+`type -t {{command}}`