• # dpkg --compare-versions

    Posté par (site web personnel) . En réponse au message Outil en ligne de commande pour comparer des versions de logiciels. Évalué à 7.

    Exemples :

    kibi@armor:~$ a=1.0; for b in 0.9 1.0 1.1; do dpkg --compare-versions $a '<<' $b; echo $?; done
1
1
0
kibi@armor:~$ a=1.0; for b in 0.9 1.0 1.1; do dpkg --compare-versions $a '<=' $b; echo $?; done
1
0
0

    Extrait de la page de manuel :

     --compare-versions ver1 op ver2
 Compare version numbers, where op is a binary operator. dpkg
 returns true (0) if the specified condition is satisfied, and
 false (1) otherwise. There are two groups of operators, which
 differ in how they treat an empty ver1 or ver2. These treat an
 empty version as earlier than any version: lt le eq ne ge gt.
 These treat an empty version as later than any version: lt-nl
 le-nl ge-nl gt-nl. These are provided only for compatibility
 with control file syntax: < << <= = >= >> >. The < and >
 operators are obsolete and should not be used, due to confusing
 semantics. To illustrate: 0.1 < 0.1 evaluates to true.

    Debian Consultant @ DEBAMAX