Finding all .c files in linux using grep

Question

I have an assignment to specify a linux command in a terminal that finds all the .c files on the system and the file name contains "lab" at the start (in all combinations of case sensitivity), followed by any number within 1-299 range ,followed by the character #, % or &. Example : lAb72# For the first part,I know that the command grep -i ignores the case sensitivity.

Answer 1

使用正则表达式： find / -regex "[LlAaBb][1-2][0-9][0-9][#%&]"

Answer 2

ls lAb*.c    # will list all c file  with starting lAb in same directory

find / -iname "lab[0-9]*[%&#]*.c" -print                # this will list in entire file system

Answer 3

This should work for you:

find . | egrep "[lL][aA][bB][1-2][0-9][0-9][%&#]\\.c$"

Start from the root or / directory, or change the above to find / instead of find .

Hope this helps