Login or Register to Ask a Question and Join Our Community


Debian

Bash script to STOP installation 'if' a file exists...

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Operating Systems Linux Debian Bash script to STOP installation 'if' a file exists...
# 1  
Old 04-18-2012
Bash script to STOP installation 'if' a file exists...
Hey all,

Here's my dilemma:

1. I'm a newbie at scripting!
2. I need to create a script that checks: If a file size is equal to zero, then stop the installation.

Is there a way to do this or am I wasting my time???

Thanx in advance! Smilie
# 2  
Old 04-18-2012
Here's a simple example but understand testing for size also tests for file existence. use "-f" to just test if a file exists.
Code:
#!/bin/bash

if [ -s testfilename ]; then
  echo "Exists and has size"
else
  echo "Does not exist or has no size"
fi

exit 0

Read up on the manual page for test (the '[' character is a shortcut for the test command):
Code:
man test

Last edited by gary_w; 04-18-2012 at 04:55 PM.. Reason: edit to work in bash
# 3  
Old 04-18-2012
thanx!
Last edited by thazsar; 05-03-2012 at 12:20 AM..
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

[Solved] Problem bash if file exists then < do...> else <do...>

Hi ! I have a problem with an if/else statement in bash. I want to check if the file exists before running a task (for example here, counting lines), and if not I need to create an empty output file if then wc -l input.tab > output.temp else >output.temp fi The problem is even if the... (2 Replies)
Discussion started by: beca123456
2 Replies

2. Windows & DOS: Issues & Discussions

Script that, if file exists in Samba share, moves file to Unix server

I'm looking to do pretty much what the title says. I want a script that runs, it can run on Unix or Windows, doesn't matter, and searches a Samba shares for a .txt file. If the file exists, the script will move (or possibly copy) the file from the Samba share into a directory on our Unix... (3 Replies)
Discussion started by: twcostello
3 Replies

3. Shell Programming and Scripting

bash script - sftpbatchfile - stop on failure

Hello all, I am currently writing a script to send files to a server over sftp. When the sftp put command succeeds it wil preform a local move from within the sftp shell to another folder (this is done so when the script is rerun no doubles will be sent). therefore i had following sollution ... (32 Replies)
Discussion started by: Kerberos
32 Replies

4. Shell Programming and Scripting

bash: check if file exists(without using if)

basically im trying to make this work in a bash shell script without using if statements if then echo testfile exists! fi what it does is check if the file exists or not i have this line but its not working, it checks if the testfile exists if it doesnt it 2> to the dev null... (3 Replies)
Discussion started by: gangsta
3 Replies

5. Shell Programming and Scripting

Script to check file exists

Hi, I am trying to write a script which checks if any file exists with "*.log" or "*.out" in Directory below is the code #------------------ path=/abd/xyz/ if ; then echo "Good" else echo "Failure" fi #-------------------------- its always going to else part and printing... (8 Replies)
Discussion started by: ch33ry
8 Replies

6. 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

7. Shell Programming and Scripting

Script to check if file exists

guys, I am trying to write a script that does the following: it looks for a file in a specific directory and if the file is not there (NOT), it emails me. I have tried the following but its not working. It simply hangs up. Please help. if then mail -s 'blah blah blah' my email... (4 Replies)
Discussion started by: basisvasis
4 Replies

8. Shell Programming and Scripting

Bash interactive installation script

Hi, for an exercise I need to write a script that will ask the user about each package in a (local) repository and install it or not according to the user's input. I am fairly new to scripting, so I did not get very far. Here is what I came up with. I really appreciate your help. ... (1 Reply)
Discussion started by: Softsmid
1 Replies

9. Shell Programming and Scripting

bash script quesiton - if any file exists then ...

I'd like a bash script to simply check to see if any file/files are present in a source directory, and if so move it/them to a target directory. I have this but it doesn't work: #!/bin/bash if then mv /source/* /target fi What is the right syntax? Thanks! (4 Replies)
Discussion started by: graysky
4 Replies

10. Shell Programming and Scripting

Check File Exists and compare to previous day file script

We have data files that are ftp'd every morning to a SUN server. The file names are exactly the same except for that each has the date included in its name. I have to write script to do 2 things: STEP 1) Verify that the file arrived in morning. STEP 2) Compare the file size of the current... (3 Replies)
Discussion started by: rbknisely
3 Replies
Login or Register to Ask a Question