Answer Posted / rikesh

Display or list all directories

Type the following command:
$ ls -l | egrep `^d'
Display or list only files

Type the following command:
$ ls -l | egrep -v `^d'

grep command used to searches input. It will filter out
directories name by matching first character d. To reverse
effect (just to display files) you need to pass -v option.
It invert the sense of matching, to select non-matching lines.
Task: Create aliases to save time

You can create two aliases as follows to list only
directories and files.
alias lf="ls -l | egrep -v '^d'"
alias ldir="ls -l | egrep '^d'"

Put above two aliases in your bash shell startup file:
$ cd
$ vi .bash_profile

Append two lines:
alias lf="ls -l | egrep -v '^d'"
alias ldir="ls -l | egrep '^d'"
Save and close the file.

Now just type lf - to list files and ldir - to list
directories only:
$ cd /etc
$ lf
Output:

-rw-r--r-- 1 root root 2149 2006-09-04 23:25 adduser.conf
-rw-r--r-- 1 root root 44 2006-09-29 05:11 adjtime
-rw-r--r-- 1 root root 197 2006-09-04 23:48 aliases
-rw------- 1 root root 144 2002-01-18 13:43 at.deny
-rw-r--r-- 1 root root 162 2006-09-22 23:24 aumixrc
-rw-r--r-- 1 root root 28 2006-09-22 23:24 aumixrc1
....
..
....

List directory names only:
$ cd /etc
$ ldirOutput:

drwxr-xr-x 4 root root 4096 2006-09-22 16:41 alsa
drwxr-xr-x 2 root root 4096 2006-09-20 20:59 alternatives
drwxr-xr-x 6 root root 4096 2006-09-22 16:41 apm
drwxr-xr-x 3 root root 4096 2006-09-07 02:51 apt
drwxr-xr-x 2 root root 4096 2006-09-08 01:46
bash_completion.d
....
.....
.

I am new to Unix and Unix Shell scripting could you guide me on how to go about these subjects and where to start from with concern to Oracle?. I also would like to know where does UNIX shell Scripting help in terms of development of a application in Oracle? I have no clue in the subject so do help me. Thank You Neelima

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