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I need to create a new empty file with the same permissions and ownership (group and user) as the source, kind of like how cp -p FILE1 FILE1.bak works but without actually copying the contents.
I know I can empty out the contents later on, but that seems wasteful.
I cant use a script - the solution must run from the command line directly.
917
To copy file permissions from one file to another file, use chmod command with the --reference switch in the following syntax, where reference_file is the file from which permissions will be copied rather than specifying mode (i.e octal or numerical mode permissions) for file.
Preserve File Permissions Using cp You can use the -p option of cp to preserve the mode, ownership, and timestamps of the file. However, you will need to add the -r option to this command when dealing with directories. It will copy all sub-directories and individual files, keeping their original permissions intact.
touch newfile
chmod `stat -c %a originalfile` newfile
chown `stat -c %U originalfile`:`stat -c %G originalfile` newfile
Use
touch newfile
chmod --reference=oldfile newfile
chown --reference=oldfile newfile
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