Skip download if files exist in wget

Question

This is simplest example running wget   wget http   www example com images misc pic png   but how to make wget skip download if pic pngis  already available

User · Answer

The -nc  --no-clobber option isn t the best solution as newer files will not be downloaded  One should use -N instead which will download and overwrite the file only if the server has a newer version  so the correct answer is    wget -N http   www example com images misc pic png      Then running Wget with -N  with or without -r or -p  the decision as to whether or not to download a newer copy of a file depends on the local and remote timestamp and size of the file   -nc may not be specified at the same time as -N       -N  --timestamping  Turn on time-stamping

User · Answer

When running Wget with -r or -p  but without -N  -nd  or -nc  re-downloading a file will result in the new copy simply overwriting the old    So adding -nc will prevent this behavior  instead causing the original version to be preserved and any newer copies on the server to be ignored     See more info at GNU

User · Answer

Try the following parameter      -nc  --no-clobber               skip downloads that would download to                                       existing files    Sample usage   wget -nc http   example com pic png

User · Answer

The answer I was looking for is at https   unix stackexchange com a 9557 114862      Using the -c flag when the local file is of greater or equal size to the server version will avoid re-downloading

[parameters] Skip download if files exist in wget?

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