Package: debian-reference Severity: wishlist On Fri, Dec 30, 2005 at 02:43:06AM +0100, Érsek László wrote: > Dear Valued Mr. Osamu Aoki, > > in the section > > http://qref.sourceforge.net/Debian/reference/ch-tips.en.html#s-rm-rf-star > http://www.debian.org/doc/manuals/reference/ch-tips.en.html#s-rm-rf-star > > you may want to > > 1) complement the "echo .[^.]*" example with "..?*" (since .[^.]* > doesn't match "..a", for example) > > 2) mention the bash shell options "dotglob", "nullglob" and "extglob", > all explained in the bash manual page. I think "dotglob" is very > dangerous but can be convenient at times, "nullglob" is also very > dangerous for simple commands but can be very convenient in loops like > "for I in *; do :; done". I find "extglob" indispensable (maybe at times > combined with "dotglob") because of the negative pattern. For example, > compute a disk usage total for everything in your home directory > _except_ DIR1 and DIR2: > > shopt -s dotglob extglob > du -skc ~/!(DIR1|DIR2) | sort -rn > > > Thank you for your attention. > > Érsek, László >
Well, it looks like quite advanced BASH only trick I never used, it is quite interesting to keep it as reminder. Currently, I am limiting tricks to standard POSIX shell or ksh extension but this seems to be BASH specific. I will think about this later. Osamu
