Compress files in unix

We use this flag whenever we need to create a new archive. When we specify this flag, it means that archive will be created using gzip compression. Providing the -v flag shows details of the files compressed. Archive file names are mapped using the -f flag. We use this flag when files need to be extracted from an archive. How to create an archive We have a list of the following files which we'll compress with tar. List of files to be compressed.

In the results below, we can see that the archive has been created successfully. Archive has been created with supplied command. How to remove files after compression Let's say we don't want to keep the original files after creating an archive. How to view the contents of an archive You might need to view the contents of an archive without actually extracting it. Viewing contents of an archive.

Extracting an archive. The command you can use to search in compressed files is zgrep : Contents of a file 'audit. We can search for a string in an archive using the below command: zgrep -Hna 'string-to-search' compressedFile. This is the result: Wrapping Up File compression helps us save time and resources when sharing files. See you around. A relative newcomer to the compression command team, xz is a front runner in terms of how well it compresses files.

Like the two previous commands, you only need to supply the file name to the command. Again, the original file is compressed in place. For large files, you are likely to notice that xz takes longer to run than other compression commands, but the compression results are very impressive.

Most people have heard it said that "size isn't everything". So, let's compare file size as well as some other issues to be considered when you make plans for how you want to compress your files. The stats shown below all relate to compressing the single file — bigfile — used in the example commands shown above. This file is a large and fairly random text file. Compression rates will depend to some extent on the content of the files.

When compared, the various compression commands shown above yielded the following results. The percentages represent how the compressed files compare with the original file.

The bzip2 , gzip and xz commands all replace the original files with compressed versions. The tar and zip commands to not. The xz command seems to take more time than the other commands to encrypt the files. For bigfile, the approximate times were:. Regardless of what permissions you have set on your original file, permissions for the compressed file will be based on your umask setting, except for bzip2 which retains the original file's permissions.

The zip command creates a file which can be used i. How to compress files without extension. Could someone please help? I'm trying to compress all the files in a directory without extension. I know for typical files with extension, the command is something like: tar -zcvf file. First off I'd like to stress that I'm a true dummy : I have a website with SSH access and since it has user generated content I want to backup my website every day end send it through FTP to a different server.

I got it working for my mysql database, so the only thing remaining are the Compress multiple files at one go. I want to compress all the files which are three years older.. I have thousands of files Could someone give me an idea how to compress all files from a given directory that are not of type. Please help. Compress files. CSV and also use a wildcard e. Also there are a lot of similar files but I want only the three latest files to be compressed.

Which is the best Hi gurus, I have a batch job running daily night automatically. The job produces file with extension '. Now due to file space constraints, most of the time, the job fails with insufficient disk space and then we have to manually start the job again and keep running the RedHat Commands. OpenSolaris Commands. Linux Commands. SunOS Commands. FreeBSD Commands.