Extract the specified file from the compressed package using the TAR command

The tar command not only extracts a package, but also extracts the files that are specified in the software package. Today a friend asked me, I just went to find the information, hehe

root@ubuntu:/tmp# tar-tf json-1.2.1.tgz  
package.xml 
json-1.2.1/readme json-1.2.1/config.m4 
Json-1.2.1/config.w32 
json-1.2.1/json.dsp 
json-1.2.1/json.c 
json-1.2.1/json_parser.c 
Json-1.2.1/json_parser.h 
json-1.2.1/php_json.h 
json-1.2.1/utf8_decode.c 
json-1.2.1/utf8_decode.h 
json-1.2.1/utf8_to_utf16.c 
json-1.2.1/utf8_to_utf16.h 
json-1.2.1/tests/fail001.phpt 
Json-1.2.1/tests/pass001.phpt 
json-1.2.1/tests/pass001.1.phpt 
json-1.2.1/tests/pass002.phpt 
Json-1.2.1/tests/pass003.phpt

For example, to extract json.c This file, you can use the following

root@ubuntu:/tmp# Tar xf json-1.2.1.tgz json-1.2.1/json.c  
tar:a Lone Zero block at 228 root@ubuntu:/tmp# Ls
  json-1.2.1  json-1.2.1.tgz 
root@ubuntu:/tmp# ls json-1.2.1/ 
json.c

See, has been decompressed out.

We can also extract multiple files inside.

root@ubuntu:/tmp# Tar xf json-1.2.1.tgz  json-1.2.1/tests/pass003.phpt  json-1.2.1/tests/pass002.phpt 
Tar:a Lone Zero block at 228
root@ubuntu:/tmp# ls 
json-1.2.1 json-1.2.1.tgz root@ubuntu:/tmp# 
ls json-1.2.1/tests/ 
pass002.phpt  pass003.phpt

OK, the files we need are already unpacked.