Create date based backups

backup() { for i in "$@"; do cp -va $i $i.$(date +%Y%m%d-%H%M%S); done }
This script creates date based backups of the files. It copies the files to the same place the original ones are but with an additional extension that is the timestamp of the copy on the following format: YearMonthDay-HourMinuteSecond
Sample Output
# ls
file1  file2  file3

# backup file1 file2 file3
`file1' -> `file1.20091110-185641'
`file2' -> `file2.20091110-185641'
`file3' -> `file3.20091110-185641'

# ls
file1  file1.20091110-185641  file2  file2.20091110-185641  file3  file3.20091110-185641

By: polaco
2009-11-10 20:59:45

What Others Think

is using $* superior to using $@ ?
thebillywayne · 658 weeks and 2 days ago
Actually for this command $@ is better than $*, i will update it. * pass all the arguments as a single string @ pass all the arguments but each argument is string protected This means that the following arguments: "a", "b" and "c plus d" are passed as: *: "a b c plus d" (5 args) @ "a" "b" "c plus d" (3 args)
polaco · 658 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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