Conditions in bash scripting (if statements)

2015年10月20日 — 文件表达式 -e filename 如果filename存在，则为真 -d filename 如果filename为目录，则为真 -f filename 如果filename为常规文件，则为真

2023年7月19日 — This uses the built-in test command to check if the file specified by TARGET_FILE exists. The -f flag checks if $TARGET_FILE is a regular file ...

2023年12月11日 — When checking if a file exists, the most commonly used FILE operators are -e and -f . The first one will check whether a file exists regardless ...

2023年4月15日 — The -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 ...

2012年4月18日 — Difference between 'if -e' and 'if -f' ... There are two switches for the if condition which check for a file: -e and -f . What is the difference ...

2019年6月7日 — Understanding -f in bash if statement · 3. -f is not a flag to 'if', it is an option to 'test' (the [ after if is 'test' - see help test). · 2.

2014年7月25日 — What does if [-f file]; mean? · 1. help test | grep -- -f. – Cyrus · [something] is equivalent to test something . As @Cyrus says, lookup test , ...

2018年7月4日 — In short, the piece of code will source /etc/bashrc file if it exists, and the existence is verified by [ command to which -f is an ...

2019年2月18日 — I found the problem. The problem was, that I was fetching the path from an config file, and thus the path was saved as string.

The basic rules of bash conditions · You can invert a condition by putting an ! in front of it. Example: if [ ! -f regularfile ]; then · You can combine ...