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Changing Unix group for files

I have a file that a colleague and I are editing together, on a Unix system. We are using Unix group permissions to edit it. We have one Unix group that we are both members of. Whenever I save the file, it changes the Unix group to…
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Find files with certain extensions

How can I use find to find all files that have a .xls or .csv extension? I have seen a -regex option but I don't know how to use it. Why not simply use this: find -name "*.xls" -o -name "*.csv" You don't need regex for this.…
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