How to extract .tar.gz files in Linux

In Linux, .tar.gz archives keep an entire directory tree in one compressed file, which makes them common for source releases, backups, and exported logs. Extracting them correctly restores the original files and subdirectories without manually unpacking each item.

A .tar.gz archive combines two layers: tar records the stored file paths, and gzip compresses that tar stream into a smaller file. The tar command can inspect the archive before extraction, unpack the whole tree into a chosen directory, or restore only one member when only part of the archive is needed.

Archive extraction writes files exactly as they are stored in the archive, so using a dedicated destination directory is safer than unpacking into a busy working tree. Archives can contain a top-level directory, nested paths, or names that would overwrite existing files, so check the member list first and use elevated privileges only when the destination path actually requires them.

1. Change to the directory that contains the archive file and confirm the filename.

   $ cd /root/sg-work/archives
   $ ls
   source
   source.tar.gz

2. Confirm that the file is a gzip-compressed tar archive.

   $ file source.tar.gz
   source.tar.gz: gzip compressed data, from Unix, original size modulo 2^32 10240

   Archives ending in .tgz use the same extraction commands as .tar.gz files.

3. List the archive members before extracting so the stored path names and top-level directory are visible.

   $ tar -tzf source.tar.gz
   source/
   source/reports/
   source/reports/report.txt
   source/beta.log
   source/alpha.txt

   The member names shown by tar -tzf are the exact paths required when extracting only one file or subdirectory later.

4. Create a clean destination directory and extract the full archive into it.

   $ mkdir -p extract
   $ tar -xvzf source.tar.gz -C extract
   source/
   source/reports/
   source/reports/report.txt
   source/beta.log
   source/alpha.txt

   -C extract changes to the destination directory before writing files. On current GNU tar builds, tar -xvf source.tar.gz -C extract also works because the compression type is detected automatically, but -z keeps the gzip layer explicit.

5. Verify that the archive restored the expected directory tree under the target path.

   $ find extract -maxdepth 3 \( -type d -o -type f \) | sort
   extract
   extract/source
   extract/source/alpha.txt
   extract/source/beta.log
   extract/source/reports
   extract/source/reports/report.txt

   Many archives already contain a top-level directory such as source. Extracting into a dedicated destination directory avoids mixing those restored paths with unrelated files in the current working tree.

6. Extract only one file from the archive when the full tree is not needed.

   $ mkdir -p single
   $ tar -xvzf source.tar.gz -C single source/reports/report.txt
   source/reports/report.txt

   Replace source/reports/report.txt with the exact member name from the earlier tar -tzf listing.

7. Confirm that only the requested file was restored.

   $ find single -maxdepth 4 \( -type d -o -type f \) | sort
   single
   single/source
   single/source/reports
   single/source/reports/report.txt