File comparison
●Compare two files
To see if there is a difference between the two files, use the "cmp" command.
Specify the file you want to compare as an argument and run it.
If there is a difference, it will print the byte position and line number. Also, if there is no difference, the cmp command will not display any message, only a prompt.
| [root@Lion ~]# cat country_list_001.txt ←Display the contents of a file Japan Afghanistan Algeria Andorra Angola Antigua and Barbuda Argentina Armenia Australia Austria Azerbaijan Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bhutan Bolivia Bosnia and Herzegovina Botswana Brazil Brazil Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada [root@Lion ~]#cat country_list_002.txt ←Display the contents of a file Japan Afghanistan Algeria Andorra Angola Antigua and Barbuda Argentina Armenia Australia Canada Austria Azerbaijan Bahamas Bangladesh Bahrain Barbados Belarus Belgium Belize Benin Bhutan Bolivia Bosnia and Herzegovina Botswana Brazil Brazil Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Comparison of "country_list_001.txt" and "country_list_002.txt". [root@Lion ~]# cmp country_list_001.txt country_list_002.txt ↑Compare the two files and display the results if there are any differences country_list_001.txt country_list_002.txt different: bytes 90、line 10 ←difference in line 10 |
●Show the differences between the three files
On Linux, you can use the diff3 command to compare three files.
Specify the three files to be compared as the arguments of the diff3 command and execute it.
| [root@Lion ~]# cat country_list_001.txt ←Display the contents of the "country_list_001.txt" file Japan Afghanistan Algeria Andorra Angola Antigua and Barbuda Argentina [root@Lion ~]# cat country_list_002.txt ←Display the contents of the "country_list_002.txt" file Japan1 Afghanistan Algeria Bahrain Angola Antigua and Barbuda Argentina [root@Lion ~]# cat country_list_003.txt ←Display the contents of the "country_list_003.txt" file Japan2 Afghanistan Algeria Andorra Angola Antigua and Barbuda Cambodia country_list_001.txt country_list_002.txt country_list_003.txt Comparison [root@Lion ~]# diff3 country_list_001.txt country_list_002.txt country_list_003.txt ==== ←There are differences between all three files. 1:1c ←The only difference is in line 1 of the first file Japan 2:1c ←The only difference is in line 1 of the second file。 Japan1 3:1c ←The only difference is in line 1 of the third file.。 Japan3 ====2 ←There is a difference in the second file "country_list_002.txt". 1:4c 3:4c Andorra ←The first and third files have the same contents. 2:4c Bahrain ←The only difference is in line 4 of the second file。 ====3 ←There is a difference in the third file "country_list_003.txt". 1:7c 2:7c Argentina ←The first and second files have the same contents. 3:7c Cambodia ←The only difference is in line 7 of the third file.。 |