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Top Forums UNIX for Advanced & Expert Users Why is editing a file by renaming the new one safer? Post 303042599 by zxmaus on Wednesday 1st of January 2020 01:28:03 AM
Old 01-01-2020
I am largely with Neo - depending on what file you are modifying, you might not even need a backup copy at all. For example, I often create feeding files for loops - and afterwards modify them (add or remove things) - these are my very own files and I usually can recreate them very easily if I ever have to - so these I modify without any backups. System files however should always be modified after a copy - ideally a copy where ownership and permissions are the same as the original - so if anything ever goes wrong - all you have to do is rename the original file to something like .old and your copy to the original filename.
BTW - in 32 years, I have not lost a single file to a system crash.
 

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INSTALL(1)							   User Commands							INSTALL(1)

NAME
ginstall - copy files and set attributes SYNOPSIS
install [OPTION]... SOURCE DEST (1st format) install [OPTION]... SOURCE... DIRECTORY (2nd format) install -d [OPTION]... DIRECTORY... (3rd format) DESCRIPTION
In the first two formats, copy SOURCE to DEST or multiple SOURCE(s) to the existing DIRECTORY, while setting permission modes and owner/group. In the third format, create all components of the given DIRECTORY(ies). Mandatory arguments to long options are mandatory for short options too. --backup[=CONTROL] make a backup of each existing destination file -b like --backup but does not accept an argument -c (ignored) -C Install file, unless target already exists and is the same as the new file, in which case the modification time won't be changed. -d, --directory treat all arguments as directory names; create all components of the specified directories -D create all leading components of DEST except the last, then copy SOURCE to DEST; useful in the 1st format -g, --group=GROUP set group ownership, instead of process' current group -m, --mode=MODE set permission mode (as in chmod), instead of rwxr-xr-x -o, --owner=OWNER set ownership (super-user only) -p, --preserve-timestamps apply access/modification times of SOURCE files to corresponding destination files -s, --strip strip symbol tables, only for 1st and 2nd formats -S, --suffix=SUFFIX override the usual backup suffix -v, --verbose print the name of each directory as it is created --help display this help and exit --version output version information and exit The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX. The version control method may be selected via the --backup option or through the VERSION_CONTROL environment variable. Here are the values: none, off never make backups (even if --backup is given) numbered, t make numbered backups existing, nil numbered if numbered backups exist, simple otherwise simple, never always make simple backups AUTHOR
Written by David MacKenzie. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for install is maintained as a Texinfo manual. If the info and install programs are properly installed at your site, the command info install should give you access to the complete manual. install (coreutils) 4.5.3 October 2002 INSTALL(1)
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