(tar.info)Creating the archive
Creating the Archive
To place the files `blues', `folk', and `jazz' into an archive named
`collection.tar', use the following command:
$ tar --create --file=collection.tar blues folk jazz
The order of the arguments is not very important, *when using long
option forms*. You could also say:
$ tar blues --create folk --file=collection.tar jazz
However, you can see that this order is harder to understand; this is
why we will list the arguments in the order that makes the commands
easiest to understand (and we encourage you to do the same when you use
`tar', to avoid errors).
Note that the part of the command which says,
`--file=collection.tar' is considered to be *one* argument. If you
substituted any other string of characters for ``collection.tar'',
then that string would become the name of the archive file you create.
The order of the options becomes more important when you begin to use
short forms. With short forms, if you type commands in the wrong order
(even if you type them correctly in all other ways), you may end up with
results you don't expect. For this reason, it is a good idea to get
into the habit of typing options in the order that makes inherent sense.
Note: short create for more information on this.
In this example, you type the command as shown above: `--create' is
the operation which creates the new archive (`collection.tar'), and
`--file' is the option which lets you give it the name you chose. The
files, `blues', `folk', and `jazz', are now members of the archive,
`collection.tar' (they are "file name arguments" to the `--create'
operation) . Now that they are are in the archive, they are called
*archive members*, not files .
When you create an archive, you *must* specify which files you want
placed in the archive. If you do not specify any archive members, GNU
`tar' will complain.
If you now list the contents of the working directory (`ls'), you
will find the archive file listed as well as the files you saw
blues folk jazz collection.tar
Creating the archive `collection.tar' did not destroy the copies of the
files in the directory.
Keep in mind that if you don't indicate an operation, `tar' will not
run and will prompt you for one. If you don't name any files, `tar'
will complain. You must have write access to the working directory, or
else you will not be able to create an archive in that directory.
*Caution*: Do not attempt to use `--create' (`-c') to add files to
an existing archive; it will delete the archive and write a new one.
Use `--append' (`-r') instead. Note: append.
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