Comments on: Linux / UNIX: Find Out If a Directory Exists or Not

By: vignesh

vignesh — Wed, 14 Dec 2011 13:15:09 +0000

i need to print the file names of all files having .txt extension of a given directory after converting to uppercase letters. The input (directory name) should be given as command line argument. The script will also check whether sufficient arguments are passed or not and whether the argument is a directory or not

i tried using this code

if [ -f $filename ]
tr “[a-z]” “[A-Z]” <$filename

but i dint get output

By: Vamsi

Vamsi — Wed, 27 Oct 2010 09:11:10 +0000

u can use test -f to check whether filename exists or not
u can use test -d to check whether directoryname exists or not

Returns “zero” if exists and “one” if doesn’t exist.

By: aneesh

aneesh — Tue, 18 Nov 2008 05:29:47 +0000

Dear Friends,

We can do the same thing to check a file exist or not by modifying the “if” loop like the following.

!/bin/bash
FILE=”$1″

if [ $# -ne 1 ]
then
echo “Usage: $0 {file-name}”
exit 1
fi

if [ -f "$FILE" ]
then
echo “$FILE file exists!”
else
echo “$FILE file not found!”
fi