Visit Our UNIX and Linux User Community

Loop for file existence

Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Loop for file existence
# 1  
Old 02-02-2006
Question Loop for file existence

I wasn't sure if I should post it here of in the Shell Script category, but I figured it was definitely a newbie question.

I'm trying to write a script that will check for the existence of a specific file (or for any files within the directory) and then take specific actions. I've removed all the extra processing in the loop, comments, and variables. I'm just trying to get my basic loop to work.

I did check the FAQ's but I think this is even too basic a question for there. Anyone's assistance with this would be appreciated.


if (test.dat exists in current directory)
echo "test.dat exists!" |mail
echo "test.dat does not exist!" |mail
# 2  
Old 02-02-2006
Use the following if

if [ -f file_name ]
# File Exists
# File does not exist
# 3  
Old 02-02-2006
What does the -f mean before the filename? I did receive and proper response e-mail when I used this. I also just tried "ls filename" and had the same result.

If I were to look for the existence of any file in that directory, would I just replace the filename with * ?

Thanks again!

Previous Thread | Next Thread
Test Your Knowledge in Computers #115
Difficulty: Easy
Linux is a continuation of the Unix design philosophy.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

File existence

Hope someone can help me on this In a directory ,files are dynamically generated.I need a script to do the following if files are not received for more than 2 hours or if the received file is empty then do something How can I put that in a script.Thank you eg. in cd /dir_name the... (13 Replies)
Discussion started by: haadiya
13 Replies

2. Shell Programming and Scripting

Checking for the file existence

Hi, I have written a script to validate the data file by referreing to the configurtion file. And moving the validated good records and bad records into HDFS. Suppose after 15 mins if i receive one more data fie,then after validation the good and bad records shold be stored in hadoop with the... (8 Replies)
Discussion started by: shree11
8 Replies

3. Shell Programming and Scripting

Script to check for the file existence, if file exists it should echo the no of modified days

Hi, I am looking for a shell script with the following. 1. It should check whether a particular file exists in a location #!/bin/sh if ; then echo "xxx.txt File Exists" else echo "File Not Found" fi 2. If file exists, it should check for the modified date and run a command... (2 Replies)
Discussion started by: karthikeyan_mac
2 Replies

4. Shell Programming and Scripting

File existence

Hi I'm using the below command in shell script to check for file exists in the path if ..... fi path and test are variables path and the file exists but the commands inside if condition is executed (! operator used) Is the above way of checking for file existence is correct? ... (4 Replies)
Discussion started by: vinoth_kumar
4 Replies

5. Shell Programming and Scripting

Parse file from remote server to calculate count of string existence in that file

Hi I need to parse the file of same name which exist on different servers and calculate the count of string existed in both files. Say a file abc.log exist on 2 servers. I want to search for string "test" on both files and calculate the total count of search string's existence. For... (6 Replies)
Discussion started by: poweroflinux
6 Replies

6. Shell Programming and Scripting

File existence and increment

count=0; while read line; do ] && let count=count+1; done < file_name.txt echo echo "$count of 10 files found " echo The scenario is a follows : I have a file which contains a list of filenames present in particular directory . I am checking fo the existence of the file and... (5 Replies)
Discussion started by: ultimatix
5 Replies

7. Shell Programming and Scripting

How to check for file existence?

i want to check if the file is in the directory or not, and also it should be handle error conditions, like missing files and report the error and exit. i did something like this: file ="hello" if !test -e "${file}" then echo "No such files exist!" exit 1 else do something....... fi ... (1 Reply)
Discussion started by: mingming88
1 Replies

8. Shell Programming and Scripting

File existence using ls

Hi I want to check a particular file is available or not. But i know only the pattern of that file sat AB1234*.txt.I need the latest file name and it ll be used in the script. How can i do this using ls -ltr command. Thanks, LathishSundar V (2 Replies)
Discussion started by: lathish
2 Replies

9. Shell Programming and Scripting

File existence

Hey all, I have total new with shell scripting so I don't know if what I need to do even possible, here it is...for a duration of time (say...1 hour) I need to check for the existence of a particular file, if it exists then I will invoke a java program or I will continue to check until a)... (2 Replies)
Discussion started by: mpang_
2 Replies

10. UNIX for Advanced & Expert Users

Searching for the existence of a file

I have a file(called dat file) which consists of some filenames with path, each line of the file(i.,e filename) needs to be searched against a directory , if the file mentioned in the dat file is found against the directory listing or not needs to go into a log file... This is needs to be in... (2 Replies)
Discussion started by: sbhan
2 Replies

Featured Tech Videos