How to issue periodical execution of DOS command in a single line

Let's say we want to check the state of the socket connection on the port 4016 every second. We can use netstat command to display required information and ping invalid IP address with timeout of 1 second. These two commands can be grouped in the same line with & operator and that group can be put inside infinite FOR loop:

Command:

C:\Users\Scrillex>for /L %a in (0,0,0) do (netstat -an|find "4016" & ping 1.1.1.1 - n 1 -w 1000 >nul)

Output:

C:\Users\Bojan>(netstat -an | find "4016" & ping 1.1.1.1 -n 1 -w 1000 1>nul)
TCP 0.0.0.0:4016 0.0.0.0:0 LISTENING
TCP [::]:4016 [::]:0 LISTENING

C:\Users\Bojan>(netstat -an | find "4016" & ping 1.1.1.1 -n 1 -w 1000 1>nul)
TCP 0.0.0.0:4016 0.0.0.0:0 LISTENING
TCP [::]:4016 [::]:0 LISTENING

C:\Users\Bojan>(netstat -an | find "4016" & ping 1.1.1.1 -n 1 -w 1000 1>nul)
TCP 0.0.0.0:4016 0.0.0.0:0 LISTENING
TCP [::]:4016 [::]:0 LISTENING
^C

To stop the execution of this single line script use CTLR-C.

DOS script which outputs directory contents into a txt file

This simple batch file prints out (recursively, including subdirectories) the content of the current directory into a text file:

list_all_files.bat:

dir /b /s * >temp.txt

dir * lists the content of the current directory. /b switch makes it to use bare format (report does not include heading information or summary). /s instructs it to use recursion. >temp.txt instructs it to output report to temp.txt file.

After running it, this is the content of temp.txt:

C:\test\list_all_files.bat
C:\test\mydir
C:\test\temp.txt
C:\test\mydir\a.txt

Links and references:
Microsoft DOS dir command