How can I determine whether a file exists in Bash? Conversely, how can I test that it does not exist?
We can check whether a file exists using the
test command-line utility:
if test -f /path/to/file; then echo "File exists." fi
To check whether a file does not exist, we can negate the condition with the NOT logical operator,
if ! test -f /path/to/file; then echo "File does not exist." fi
test command is used frequently in Bash expressions, we can write it as
 rather than typing out
if ! [ -f /path/to/file ]; then echo "File does not exist." fi
-f flag tests whether the provided filename exists and is a regular file. To test for directories instead, we can use the
-d flag. To test for both files and directories, we can use the
More information about
test can be found on its manual page, accessible by typing
man test into the terminal.
Loved by over 4 million developers and more than 90,000 organizations worldwide, Sentry provides code-level observability to many of the world’s best-known companies like Disney, Peloton, Cloudflare, Eventbrite, Slack, Supercell, and Rockstar Games. Each month we process billions of exceptions from the most popular products on the internet.
Here’s a quick look at how Sentry handles your personal information (PII).×
We collect PII about people browsing our website, users of the Sentry service, prospective customers, and people who otherwise interact with us.
What if my PII is included in data sent to Sentry by a Sentry customer (e.g., someone using Sentry to monitor their app)? In this case you have to contact the Sentry customer (e.g., the maker of the app). We do not control the data that is sent to us through the Sentry service for the purposes of application monitoring.Am I included?
We may disclose your PII to the following type of recipients:
You may have the following rights related to your PII: