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9.3.1 ProblemYou need to set permissions on all the files or a directory, or on batches of files. 9.3.2 Solutionchmod supports operating on lists of files. You can also use find or shell wildcards to generate a list. To make several files read-only for everyone, you can use chmod as follows: $ chmod 444 file.txt file2.txt file3.txt To make all files in the current directory readable/writable, for the file owner and group, without changing the directory permissions, use: $ find . -type f -exec chmod -v 660 { } \; You can also change all files belonging to a particular user. This example starts at the root of the filesystem: $ find / -user terri -exec chmod -v 660 { } \; You can set permissions for a directory and its contents, including subdirectories, with the -R (recursive) flag: $ chmod -R -v 755 /shared This example makes all the .txt files in the current directory readable/writable to the owner, and world-readable: $ chmod -v 644 *.txt To change all files in the current directory that begin with your chosen string, use: $ chmod -v 644 apt* 9.3.3 See Also
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