Have you ever wondered why a given binary or package installed on your system does not work according to you expectations, meaning it does not function correctly as it is supposed to do, perhaps it can not event start at all.
While downloading packages, you may face challenges of unsteady network connections or unexpected power blackouts, this can result into installation of corrupted package.
Considering this as an important factor in maintaining uncorrupted packages on your system, it is therefore a vital step to verify the files on the file system against the information stored in the package by using following article.
How to Verify Installed Debian Packages Against MD5 Checksums
On Debian/Ubuntu systems, you can use the debsums tool to check the MD5 sums of installed packages. If you want to know the information about debsums package before installing it, you can use APT-CACHE like so:
Next, install it using apt command as follows:
Now its time to learn how to use debsums tool to verify MD5sum of installed packages.
Note: I have used sudo with all the commands below because certain files may not have read permissions for regular users.
In addition, the output from the debsums command shows you the file location on the left and the check results on the right. There are three possible results you can get, they include:
- OK – indicates that a file’s MD5 sum is good.
- FAILED – shows that a file’s MD5 sum does not match.
- REPLACED – means that the specific file has been replaced by a file from another package.
When you run it without any options, debsums checks every file on your system against the stock md5sum files.
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