manual pages

[bramborkax]

Hi, I want to install manual pages.
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[admin@(none) root]$ ipkg install man
Installing man (1.5p-4) to root...
Downloading http://ipkg.nslu2-linux.org/feeds/unslung/wl500g/man_1.5p-4_mipsel.ipk
Configuring man
Successfully terminated.
[admin@(none) root]$ ipkg install man-pages
Installing man-pages (2.33-3) to root...
Downloading http://ipkg.nslu2-linux.org/feeds/unslung/wl500g/man-pages_2.33-3_mipsel.ipk
Configuring man-pages
Successfully terminated.
[admin@(none) root]$ man man
Warning: cannot open configuration file /opt/etc/man.conf
sh: /usr/bin/gtbl: not found
sh: /usr/bin/nroff: not found
sh: /usr/bin/less: not found
Error executing formatting or display command.
System command (cd /opt/man && (echo ".pl 1100i"; /bin/cat '/opt/man/man1/man.1'; echo ".\\\""; echo ".pl \n(nlu+10") | /usr/bin/gtbl | /usr/bin/nroff -Tlatin1 -mandoc | /usr/bin/less -is) exited with status 32512.
No manual entry for man
[admin@(none) root]$
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Does anybody know, what´s wrong?

Directory /opt/etc exists


Thank you.