Improve description.

diff --git a/blog/data/2018-07-08-apt-upgrade-full-disk.txt b/blog/data/2018-07-08-apt-upgrade-full-disk.txt
index 2d0baa23bcbcd45a213cc804ad7711b4d5ab4366..9eb76a5083c69b02bd481b0f08b0bab6d2c3dcf1 100644 (file)
--- a/blog/data/2018-07-08-apt-upgrade-full-disk.txt
+++ b/blog/data/2018-07-08-apt-upgrade-full-disk.txt
@@ -45,9 +45,13 @@ for p in $(apt list --upgradable | ignore "$@" |cut -d/ -f1 | grep -v '^Listing.
 done
 </pre></blockquote></p>
 
-<p>To use it, simply run it as root from the command line.  If it
-fail, try 'apt install -f' to clean up the mess and run the script
-again.</p>
+<p>The script will extract the list of packages to upgrade, try to
+download the packages needed to upgrade one package, install the
+downloaded packages using dpkg.  The idea is to upgrade packages
+without changing the APT mark for the package (ie the one recording of
+the package was manually requested or pulled in as a dependency).  To
+use it, simply run it as root from the command line.  If it fail, try
+'apt install -f' to clean up the mess and run the script again.</p>
 
 <p>It take one option, a package to ingore in the list of packages to
 upgrade.  The option to ignore a package is there to be able to skip