When you install Wireshark, a range of command-line tools also gets installed, including:
capinfos.exe: This prints information about trace files
dumpcap.exe: This captures packets and saves to a libpcap format file
editcap.exe: This splits a trace file, alters timestamps, and removes duplicate packets
mergecap.exe: This merges two or more packet files into one file
rawshark.exe: This reads a stream of packets and prints field descriptions
text2pcap.exe: This reads an ASCII hex dump and writes a libpcap file
tshark.exe: This captures network packets or displays data from a saved trace file
The Wireshark.exe file launches the GUI version you're familiar with, but you can also launch Wireshark from the command line with a number of parameters; type Wireshark –h for a list of options and/or create shortcuts to launch Wireshark with any of those options.
Note
It is very helpful to add the Wireshark program directory to your system's PATH statement so that you can execute any of the command-line utilities from any working directory.