From the course: Linux System Engineer: Bash Shell Scripting for Automation
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File conditions
From the course: Linux System Engineer: Bash Shell Scripting for Automation
File conditions
- [Instructor] Using if conditionals, we can do quite a few tests on files. Let's get right into it. Dash e checks if the file exists. Now in Linux, everything is a file, including devices. This check doesn't discern. Dash f, however, checks if a file exists and is a file. Dash d checks if a file exists and is a directory. Dash c checks if a file exists and is a character device. Dash b checks if a file exists and is a block device. Dash p checks if a file exists and is a named pipe. Dash capital S checks if a file exists and is a socket. Dash capital L checks if a file exists and is a symbolic link. Dash g checks if a file exists and has the SGID bit set. Dash u checks if a file exists and has the SUID bit set. Dash r checks if a file exists and is readable by the current user. Dash w checks if a file exists and is writable by the current user. Dash x checks if a file exists and is executable by the current user. Dash s checks if a file exists and it has a size larger than zero…
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