Unix shell compare two files

Ask Question. Asked 4 years, 3 months ago. Active 1 year, 5 months ago. Viewed 93k times. How to write it? Improve this question. Patrick Mevzek 2, 2 2 gold badges 17 17 silver badges 28 28 bronze badges. Have you try to use diff command? Add a comment. Active Oldest Votes. To just test whether two files are the same, use cmp -s :!

If your two input files contains list of pathnames of files that you wish to compare, then use a double loop like so:! It is assumed that no pathname in the two input files contain any embedded newlines. Improve this answer. The easiest way is to use the command diff. I need to run the laundry. I need to wash the dog. I need to get the car detailed. I need to do the laundry. Dennis Williamson Dennis Williamson k 87 87 gold badges silver badges bronze badges. Phill Pafford Phill Pafford Thats not what I needed.

I need to compare only the identifiers and update like in database. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually.

Show Posts. Shell Programming and Scripting. Script to compare file sizes. Registered User. Join Date: Apr I need to write a bash script larger X Y that compares the sizes of two specified files X and Y, and reports which file is larger. For example, if X is larger, the output should be "File X is larger", while if Y is larger, the output should be "File Y is larger". If the files are exactly the same size, the output should be "File X and File Y are exactly the same size".

If fewer than two command line arguments are specified, an appropriate error message should be given. Last edited by fpmurphy; at PM.. Join Date: Aug Is this homework? Anyway, look at the stat command to know the size of a file: Code :. Code :. Last edited by tukuyomi; at PM.. Shell script to compare two files.

I have two files; file A and file B. I need all the entries of file A to be compared with file B line by line. If the entry exists on file B, then save those on file C; if no then save it on file D Note :- all the columns of the lines of file A need to be compared, except the last two columns Shell script compare all parameters in two files and display results.

Hi , I am not familiar with shell programming. I have a requirement like i have two files. I need to compare the two files by comparing each parameter and i should produce 2 outputs.

Shell Script to Compare Two Files. I have a directory with about 6 files that we receive regularly. Compare semicolon seperated data in 2 files using shell script. I want to : Sort the data in both files by field1. How to compare two files using shell script. RedHat Commands. OpenSolaris Commands. Linux Commands.