UNIX: Remove A File With A Name Starting With – (dash) Character

[cah]

Sometimes, filename start with a dash/hyphen (-) appear in UNIX file systems.

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-rw-r--r--   1 www      www         1021 Apr 26 13:17 -20160426131707.csr

Regular 'rm' cannot remove the files.
E.g.

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# rm -f -20160426131707.key
rm: illegal option -- 2
rm: illegal option -- 0
rm: illegal option -- 1
rm: illegal option -- 6
rm: illegal option -- 0
rm: illegal option -- 4
rm: illegal option -- 2
rm: illegal option -- 6
rm: illegal option -- 1
rm: illegal option -- 3
rm: illegal option -- 1
rm: illegal option -- 7
rm: illegal option -- 0
rm: illegal option -- 7
rm: illegal option -- .
rm: illegal option -- k
rm: illegal option -- e
rm: illegal option -- y
usage: rm [-fiRr] file ...

There are 2 ways to remove them.

1. Remove from current directory

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# rm ./-20160426131707.key

2. Use "--" in front

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# rm -- -20160426131707.key