GNU/Linux

How to retrieve the SSL cert expiration date from a PEM encoded certificate?

 in Bash / GNU/Linux  tagged certbot / certificate / enddate / expiration / openssl / PEM / ssl by

We use the following command to get the ending date of PEM encoded certificates that are generated using certbot and Let's Encrypt:

openssl x509 -enddate -noout -in fullchain.pem;

To get a list of all certificates and their expiration dates, we issue the following find command that executes the above snippet on each result while printing the name of the file first.

find ~/certificates/ -name "fullchain.pem" -print -exec openssl x509 -enddate -noout -in '{}' \;

In this example, the certificates are in our home folder under the name ‘certificates’. The results will look like the following sample:

/home/tux/certificates/example.com/fullchain.pem
notAfter=Aug 22 10:12:55 2021 GMT
/home/tux/certificates/site2.example.com/fullchain.pem
notAfter=Nov 22 03:22:44 2021 GMT

Netflix error f7701-1003 on Ubuntu 1

 in GNU/Linux  tagged bash / codecs / firefox / GNU/Linux / netflix / ubuntu by

Recently we got the error F7701-1003 on Netflix after an update on the operating system was performed. To repair it we installed the package libavcodec-extra using the following command:

sudo apt install libavcodec-extra;

After the installation was complete, we just restarted the browser and Netflix was operating again as expected.

Below is the basic information about the package that was installed:

Package: libavcodec-extra
Version: 7:4.2.4-1ubuntu0.1
Priority: extra
Section: universe/libs
Source: ffmpeg
Origin: Ubuntu
Maintainer: Ubuntu Developers <[email protected]>
Original-Maintainer: Debian Multimedia Maintainers <[email protected]>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 65,5 kB
Depends: libavcodec-extra58 (= 7:4.2.4-1ubuntu0.1)
Homepage: https://ffmpeg.org/
Download-Size: 14,8 kB
APT-Manual-Installed: yes
APT-Sources: http://cy.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages
Description: FFmpeg library with extra codecs (metapackage)
 FFmpeg is the leading multimedia framework, able to decode, encode, transcode,
 mux, demux, stream, filter and play pretty much anything that humans and
 machines have created. It supports the most obscure ancient formats up to the
 cutting edge.
 .
 This metapackage depends on the latest version of the libavcodec variant
 that offers additional codec support. Application packages can depend
 on it if they require or suggest this variant in a robust manner.

Package: libavcodec-extra
Version: 7:4.2.2-1ubuntu1
Priority: extra
Section: universe/libs
Source: ffmpeg
Origin: Ubuntu
Maintainer: Ubuntu Developers <[email protected]>
Original-Maintainer: Debian Multimedia Maintainers <[email protected]>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 65,5 kB
Depends: libavcodec-extra58 (= 7:4.2.2-1ubuntu1)
Homepage: https://ffmpeg.org/
Download-Size: 14,8 kB
APT-Sources: http://cy.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
Description: FFmpeg library with extra codecs (metapackage)
 FFmpeg is the leading multimedia framework, able to decode, encode, transcode,
 mux, demux, stream, filter and play pretty much anything that humans and
 machines have created. It supports the most obscure ancient formats up to the
 cutting edge.
 .
 This metapackage depends on the latest version of the libavcodec variant
 that offers additional codec support. Application packages can depend
 on it if they require or suggest this variant in a robust manner.

Using scp to copy a folder on a custom port

 in Bash / GNU/Linux  tagged scp by 
while true;
do
date;
scp -rp -P 2222 $SOURCE_DIRECTORY $REMOTE_USER@$REMOTE_SERVER:$DESTINATION_DIRECTORY;
sleep 60;
done;

The above code was used to copy the contents of a local folder to a remote one every one minute. We did not want to lose the metadata of the files (including the modification date of the files) so we used the -p parameter to preserve that information.

The -P 2222 parameter instructs scp to use a different port rather the default.

The -r is used to instruct the copy to get all contents of the folder and its sub-folders.

The above code as a one-liner is:

while true; do date; scp -rp -P 2222 $SOURCE_DIRECTORY $REMOTE_USER@$REMOTE_SERVER:$DESTINATION_DIRECTORY; sleep 60; done;