Bash check for file extension

Thx in advance. Check file extension. Hi , I am FTPing the file. Once the file is FTPied I need to check whether that file currently transferred is of. What command to use to find the extension of the file?. Thanks Mahalakshmi. A 6 Replies. RedHat Commands. OpenSolaris Commands. Linux Commands. SunOS Commands. FreeBSD Commands. Full Man Repository. Advanced Search. Contact Us. Forum Rules. Mark Forums Read.

Thread Tools. View Public Profile for sunday8. Find all posts by sunday8. View Public Profile for porter. Find all posts by porter. Learn more. How to check the extension of a filename in a bash script? Ask Question. Asked 13 years ago. Active 8 months ago. Viewed k times. Everything is fine and dandy except for one little snag:!

How can I determine if a file has a. Improve this question. Anthon This will break if you have a file with a space in its name.

Add a comment. Active Oldest Votes. Improve this answer. I didn't know about this. Personally I think this is clearer than my answer. I am new to bash and it took me a little while to figure out how to use this in a multi conditional if statement.

I am sharing it here in case it helps someone. It's shorter, clearer, easier to add additional extensions and could be easily made configurable by putting "csv png" in a variable. You can put double quotes around the file. Should I use this answer instead of the accepted one? Show 1 more comment. Teemu Leisti 3, 2 2 gold badges 28 28 silver badges 37 37 bronze badges.

Paul Stephenson Paul Stephenson 63k 9 9 gold badges 47 47 silver badges 49 49 bronze badges. In this guide, learn how to use a bash command to check if a file or directory exists. Note: You may encounter the term bash script. This is a sequence of several commands to the shell.

A script can be saved as a file and is often used to automate multiple system commands into a single action. The first line executes the test to see if the file exists. The second command, echo , displays the results 0 meaning that the file exists, 1 means no file was found.

To check if a directory exists, switch out the —f option on the test command for —d for directory :. This command works the same as it does for files, so using brackets instead of the test command works here also. Note: If you are searching for a file or directory because you need to delete it, refer to our guide on removing files and directories with Linux command line.

Typically, testing for a file returns 0 true if the file exists, and 1 false if the file does not exist. For some operations, you may want to reverse the logic. The exclamation point! This command makes sure there is not a file named test. You should see test. You can use a similar command for a directory — replace the —f option with —d :. As usual, changing the —f option to —d lets you run the same test for multiple directories.

There are many other options available.