Bin sh if file not exists

Active 4 years, 6 months ago. Viewed 9k times. As an aside -- all-caps names are used for variables with meaning to the OS or shell, whereas lowercase names are reserved for application use. See fourth paragraph of pubs. CharlesDuffy, thank you for that information, I never knew that distinction and have always used all caps for globally available variables. Add a comment. Active Oldest Votes. Is this normal? The -- argument specifies to mv that all following arguments are names, even if they start with - s.

Charles Duffy Charles Duffy k 36 36 gold badges silver badges bronze badges. Thank you a TON. This did the trick and everything works great! I find it interesting that the single file limit was not a problem in bash but in sh it was an issue.

Join Date: Nov You are on the right track, but you need to tell the shell what to do with the -r test. You can either use the command test ef if test -r Also you are testing for read permission on file rather than -f file or -s file has content and exists.

Shell Programming and Scripting. Determine a shell variable exists in file? Hi Folks, Trying to build up a script that will lookup a username invoked as:.

Open a file from within a Bourne shell Script. I am suppose to make a program that cuts the extension off of a file. It uses that. This only finds the name of the program from a list of programs I made.

My problem is when it has the name of the program it needs to use, how can I How to check the repetition values in a file using bourne shell. Hi all, I have a scenario, like consider a file abc. In this situation i need to throw an error for the repeatation of keys like "value1" is repeating twice. Checking if file exists using a NOT operator and shell variable. Hi, I'm new to UNIX, at least shell programming and am having trouble figuring out a problem i'm having.

In one section in my nested if statement, i want the program to test if the file does not exist, based on an argument supplied at the command line by the user. What i have is elif ; then Shell script to check if any file exists in 4 folders. This really belongs on stackoverflow — Kevin Kuphal. Not necessarily, this kind of thing is important in init scripts and other sysadmin tools.

Thus, it shouldn't necessarily be migrated from either site to the other. If you're not even able to read a man page, you really should have a look at superuser. Benoit: The question is fine, I think, if you listen to podcast 58, they want questions like this.

That's why I think this question belongs to superuser. Add a comment. Active Oldest Votes. Improve this answer. Kyle Brandt Kyle Brandt Single brackets are an alias for test, which is a shell built-in.

Reference page for file testing Once you run through all those pages, Keep this Reference sheet handy. There is always the man pages: man test.

Chad Huneycutt Chad Huneycutt 2, 1 1 gold badge 16 16 silver badges 14 14 bronze badges. Check it for folder with same name Sign up or log in Sign up using Google. Sign up using Facebook.