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SuSE 11.3 - man page for screendump (suse section 1)

SCREENDUMP(1)							   Linux Console						     SCREENDUMP(1)

screendump - dump the contents of a virtual console to stdout
screendump [ N ]
The screendump command dumps the contents of virtual console N , (or the current console if N is omitted) to standard out. Just saying cat /dev/vcsN has a similar effect.
For security reasons, screendump uses linux devices "virtual console screen" and "virtual console screen with attributes" to give access for screendump. Ensure these files exist, using cd /dev for i in 0 1 2 3 ...; do mknod vcs$i c 7 $i mknod vcsa$i c 7 `expr 128 + $i` done (filling in the ellipses) and give the device files appropriate permissions, or run screendump as root.
setterm(1) 2002-02-24 SCREENDUMP(1)