I am going to try my best to explain my own experiences with various file types
First up, TAR!
#TAR Files
<-xf` = Extract File
#!/bin/bash
for i in {1000..0}
do
tar -xf "$i.tar"
done
The above runs a loop extraction
rm *(file type) = Removes all files in a directory by file name type
PCAP = Packet Capture. Basically a PCAP is a digital representation of packets of information being sent and received over the net....i think.