Question

I would like to get a list of all symlinks within a directory that has valid links. In other words, I would like all the broken links to be discarded in my list.

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Solution

In shell, [ -L "$f" ] && [ -e "$f" ] is true if and only if "$f" is the name of a symlink whose target exists. So:

for f in *; do
    if [ -L "$f" ] && [ -e "$f" ]; then
        # do something with "$f"
    fi
done

(Never use the -a or -o options to test/[...]; they cannot be relied on to have sane precedence.)

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