Help with Linux please read the question. i know how to use basic commands. thes

Question

Help with Linux

please read the question. i know how to use basic commands. these answers require globbing, which i cant seem to get right.

using ubuntu

5. What command, issued from your home directory, will output the number of directories and files in /usr/share/man which contain at least one digit in their extensions?

ls -ld *.[0-9] /usr/share/man

didnt work

7. What ls command used with a globbing expression will list those files in /tmp/notes which contain three fours in the basename portion (pre-extension part) of the filename? (Must use globbing expression--no grep!)

tried ls *444* /tmp/notes

ls *[444]. /tmp/notes tells me - ls: *444*#: No such file or directory

Explanation / Answer

5
ls /usr/share/man |egrep '.*..*[0-9].*' |wc -l

7
ls /tmp/notes |egrep '.*444.*..*' |wc -l

NOTE:

. (dot) represents any character

. (back slash)(dot) represents a dot as character

[c-f] - the dash within the square brackets operates as a range. In this case it means either the letters c, d, e or f.

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