How to compare two zip files in unix

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. Related 4. Hot Network Questions. Those should be. Code :. Join Date: Jul Compare two files and write data to second file using awk.

Hi Guys, I wanted to compare a delimited file and positional file, for a particular key files and if it matches then append the positional file with some data. I want to compare records present in 1 file with those in 3 other files and print those records of file 1 which are not present in any of the files.

Compare and find records of file1 not in file2. Compare multiple files, identify common records and combine unique values into one file. Good morning all, I have a problem that is one step beyond a standard awk compare.

I would like to compare three files which have several thousand records against a fourth file. All of them have a value in each row that is identical, and one value in each of those rows which may be duplicated Compare two files with different number of records and output only the Extra records from file1.

Hi Freinds , I have 2 files. Compare values in two files. For matching rows print corresponding values from File 1 in File2. If a match is found, print the corresponding value from Column2 of File1 in Column5 of File2. In the example below, you can probably see that we're looking at three separate columns of output. The first and second represent the first and second files. The third shows the lines which are the same in both of the two files. As you can see in the second example below, comparing a file to itself shows all of the output in column 3.

Checksums can also tell you if files are different. While this might not be advantageous when the files are on the same system, it can help a lot when they're on different systems.

By running the cksum command on each of the two systems, you can determine if they're the same without having to move either of the files to the other system or share a file system or directory. Note that the cksum command is often used to verify the integrity of system files.

You can use an ssh command to get the checksum for the file on a remote system to see if they are the same or different. You can also compare files on two system without having to copy one of the file between systems or compare checksums by using a command like this one:. The diff3 command works a lot like diff , but allows you to compare three files instead of only two. However, this command doesn't have all the options that the diff has and, no, there's no diff4, diff5, etc.

Comparing files two at a time with your favorite comparison tool is probably a better strategy most of the time. This won't let you diff the contents of files within the zip archives, but will let you quickly see which files appear within one only archive and which files exist in both but have different content i.

I found relief with this simple Perl script: diffzips. It recursively diffs every zip file inside the original zip, which is especially useful for different Java package formats: jar, war, and ear. WinMerge windows only has lots of features and one of them is:. I generally use an approach like mrabbit's but run 2 unzip commands and diff the output as required. A lot of the solutions here are either only checking the CRC to see if differences exist , are complicated scripts, require uncompressing to disk, use external programs, or need specific compression formats other than the one you were asking about zcat does NOT work with zip.

Here's one that's simple, easy to read, and should work wherever you have bash that shows the differences between the file contents if, like me, that's what you needed when you happened across this question :. This decompresses in-memory, not to disk, releasing data from the pipe as it diffs it wont decompress and then compare, so shouldn't use much memory.

Want to change diffing options for ignoring whitespace or using side-by-side? Change diff to diff -w or gvimdiff this one will keep all files in memory et cetera. Say you only want to diff the. Only want to see the filenames that are missing from one or the other? Remove the while line and it wont bother decompressing.

It will even safely handle skip and record it to stderr filenames with "illegal" characters like newlines and backslashes. Doesn't get "safe"r than this. If for some reason you want that but a step above CRC, in this answer you could add shasum before the ; done for example and get 'the worst of both worlds' :P.

Whilst the scripts are simple and would be a cinch to port to the [syntactically] fantastic powershell, it wouldn't work. The native cmdlet only extracts to disk and MS still haven't fixed the broken binary data piping in PS so you cant "safely" use an external zip.

Apparenlty others have done similar things using the. NET :. Add other ctrl chars as you happen across them. As a bonus; you can write all these diffs straight to an archive and keep them all in a folder heirarchy matching the original files instead of trying to read it all at once in one big splat.

Not as pretty a script, but now you can open it up in your gui archiver of choice or do unzip -p diff. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Is there a safe way to run a diff on two zip compressed files?