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sudo apt-get install -f
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
1 not fully installed or removed.
Need to get 0 B/1,077 kB of archives.
After this operation, 0 B of additional disk space will be used.
dpkg: error processing package docbook-xsl (--configure):
 package docbook-xsl is not ready for configuration
 cannot configure (current status 'half-installed')
Errors were encountered while processing:
 docbook-xsl
E: Sub-process /usr/bin/dpkg returned an error code (1)