{"id":1865,"date":"2017-03-23T16:57:31","date_gmt":"2017-03-23T11:27:31","guid":{"rendered":"https:\/\/www.wikitechy.com\/technology\/?p=1865"},"modified":"2017-03-28T18:03:10","modified_gmt":"2017-03-28T12:33:10","slug":"can-find-broken-symlinks","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/technology\/can-find-broken-symlinks\/","title":{"rendered":"[ Solved – 5 Answers ] PYTHON – How can you find broken symlinks"},"content":{"rendered":"

Is there a way to find all symbolic links that don’t point anywere?<\/p>\n

Bash Code<\/span> <\/div> 
find .\/ -type l<\/code><\/pre> <\/div>\n[ad type=”banner”]\n
will give me all symbolic links, but makes no distinction between links that go somewhere and links that don’t.<\/p>\n
You are currently doing:<\/p>\n
 
 Python Code<\/span> <\/div> 
find .\/ -type l -exec file {} \\; |grep broken<\/code><\/pre> <\/div>\n
The symlinks command can be used to identify symlinks with a variety of characteristics. For instance:<\/p>\n
 
 Bash Code<\/span> <\/div> 
$ rm a$ ln -s a b$ symlinks .dangling: \/tmp\/b -> a<\/code><\/pre> <\/div>\n
find -L can have unexpected consequence of expanding the search into symlinked directories, so isn’t the optimal approach.<\/p>\n
 
 Python Code<\/span> <\/div> 
find \/path\/to\/search -xtype l<\/code><\/pre> <\/div>\n
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is the more concise, and logically identical command to<\/p>\n
 
 Python<\/span> <\/div> 
find \/path\/to\/search -type l -xtype l<\/code><\/pre> <\/div>\n
None of the solutions presented so far will detect cyclic symlinks, which is another type of breakage. this question addresses portability.
\nTo recap, the portable way to find broken symbolic links, including cyclic links, is:<\/p>\n
 
 Python Code<\/span> <\/div> 
find \/path\/to\/search -type l -exec test ! -e {} \\; -print<\/code><\/pre> <\/div>\n
To display a list of the broken links, replacing ${directory} with the desired root directory Edit<\/p>\n
 
 Python Code<\/span> <\/div> 
find \/path\/to\/search -xtype l      for f in $(find \/path\/to\/search -type l); do if [ ! -e "$f" ]; then echo "$f"; fi; done<\/code><\/pre> <\/div>\n
To display a list of the broken links,<\/p>\n
 
 Python Code<\/span> <\/div> 
find -xtype l -exec ls -l {} \\;find \/usr\/local\/bin -type l | while read f; do if [ ! -e "$f" ]; then ls -l "$f"; fi; done<\/code><\/pre> <\/div>\n
all one line, if there are broken links it will display them with ls -l<\/p>\n
This will print out the names of broken symlinks in the current directory.<\/p>\n
 
 Python Code<\/span> <\/div> 
for l in $(find . -type l); do cd $(dirname $l); if [ ! -e "$(readlink $(basename $l))" ];         then echo   $l; fi; cd - > \/dev\/null; done<\/code><\/pre> <\/div>\n
Works in Bash.<\/p>\n
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Is there a way to find all symbolic links that don’t point anywere? [ad type=”banner”] will give me all symbolic links, but makes no distinction between links that go somewhere and links that don’t. You are currently doing: SOLUTION 1: The symlinks command can be used to identify symlinks with a variety of characteristics. For […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4148],"tags":[3933,3942,3941,3943,3936,3934,3939,3931,3935,3937,3938,3940,3932],"class_list":["post-1865","post","type-post","status-publish","format-standard","hentry","category-python","tag-and-any-combination-thereof-leading-to-a-filedir","tag-how-can-i-relink-a-lot-of-broken-symlinks","tag-how-can-i-detect-whether-a-symlink-is-broken-in-bash","tag-how-do-i-tell-if-a-folder-is-actually-a-symlink-and-how-do-i-fix-it-if-its-broken","tag-how-to-find-dead-symbolic-links","tag-how-to-find-a-symlink-when-the-location-in-which-it-was-created-is-unknown","tag-how-to-grep-stderr","tag-how-to-prevent-find-execdir-from-following-symlinks","tag-how-would-i-find-any-symlinks-on-my-system-that-reference-tmp","tag-linux-find-broken-symlinks-with-python","tag-list-all-symbolic-links-to-valid-directories-only-with-find","tag-soft-link-detection","tag-thoroughly-find-all-links-hard-and-symlinks"],"_links":{"self":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/1865","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/comments?post=1865"}],"version-history":[{"count":0,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/1865\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/media?parent=1865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/categories?post=1865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/tags?post=1865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}