kindly give me the shell programming code for the following :-?

Question

1. To find all the files and folders created in past 24 hours.

2. To modify egrep command so that it takes multile inputs.

i want egrep to search multiple patterns

Answer 1

I assume this is a *NIX operating system, right?

The first would be would be:
find -ctime -1

The second, just give it a comma-delimited list, IIIRC. Might not even need commas.

Answer 2

1. use "find", and read the man page for the options about create/modified dates for files (actually in Unix I think there are 3 kinds of dates, on a file, but read the manual for your system).

2. perhaps you could just "cat" the 3 files one by one, into a pipe, and have egrep read from stdin.

Answer 3

find . -ctime -24

egrep - like most unix commands - takes a list of files
as inputs, so I'm not clear on what you are asking for:

egrep 'expr1|expr2|expr3' file1 file 2 *.files

Answer 4

You can use find command with -atime option to print file names..

find . -type f -atime +7 -print

try following..

man find