In contrast to most of the competing utilities, unzip removes the 12 additional header bytes of encrypted entries from the compressed size numbers. The complete size of the encryped compressed data stream for zipfile entries is reported by the more verbose zipinfo 1L reports, see the separate manual. As a modifier it works in conjunction with other options e. The -aa option forces all files to be extracted as text, regardless of the supposed file type.
This is a shortcut for a. On Tandem, -a is enabled by default, see above. Doubling the option -bb forces all files to be extracted in this format. When extracting to standard output -c or -p option in effect , the default conversion of text record delimiters is disabled for binary -b resp.
This is similar to the default behavior of emacs 1 in many locations. The -C option affects file specs in both the normal file list and the excluded-file list xlist. Please note that the -L option does neither affect the search for the zipfile s nor the matching of archive entries to existing files on the extraction path.
When the stored filename appears to already have an appended NFS filetype extension, it is replaced by the info from the extra field. All Macintosh specific info is skipped. Data-fork and resource-fork are restored as separate files. Without this flag, these attribute bits are cleared for security reasons. The -LL option forces conversion of every filename to lowercase, regardless of the originating file system. Unlike Unix more 1 , there is no forward-searching or editing capability.
On some systems the number of available lines on the screen is not detected, in which case unzip assumes the height is 24 lines. If a file already exists, skip the extraction of that file without prompting. By default unzip queries before extracting any file that already exists; the user may choose to overwrite only the current file, overwrite all files, skip extraction of the current file, skip extraction of all existing files, or rename the current file. File comments are created with the -c option of zip 1L , or with the -N option of the Amiga port of zip 1L , which stores filenotes as comments.
This is a dangerous option, so use it with care. Many multi-user operating systems provide ways for any user to see the current command line of any other user; even on stand-alone systems there is always the threat of over-the-shoulder peeking.
Storing the plaintext password as part of a command line in an automated script is even worse. Whenever possible, use the non-echoing, interactive prompt to enter passwords.
And where security is truly important, use strong encryption such as Pretty Good Privacy instead of the relatively weak encryption provided by standard zipfile utilities. The -q [ q ] options suppress the printing of some or all of these messages.
Since all PC operating systems allow spaces in filenames, unzip by default extracts filenames with spaces intact e. This can be awkward, however, since MS-DOS in particular does not gracefully support spaces in filenames. Conversion of spaces to underscores can eliminate the awkwardness in some cases. See -L above. VMS files can be stored with a version number, in the format file. On file systems that limit filenames to particularly short lengths, the version numbers may be truncated or stripped regardless of this option.
Currently, UnZip uses the same pattern matching rules for both wildcard zipfile specifications and zip entry selection patterns in most ports.
In most cases this will require special system privileges, and doubling the option -XX under NT instructs unzip to use privileges for extraction; but under Unix, for example, a user who belongs to several groups can restore files owned by any of those groups, as long as the user IDs match his or her own. Note that ordinary file attributes are always restored--this option applies only to optional, extra ownership info available on some operating systems.
This mimics how most UI unzip tools work. Show 1 more comment. You can zip files up in compressed format with the GNU tar program: tar -zcvf myfile. To unzip that file, use: tar -zxvf myfile. Or use tar jcvf file. I downvoted your answer because the question is about how to deal with zip archives not tar files. Starfish, that's certainly within your rights, thanks for at least explaining why, so many people don't take the time to do that :- I took "zip" in the more generic sense compression rather than a specific format, so I'll make that more clear.
Be aware that tar archives may not work correctly when moving between different platforms, mac to linux or vice versa. Zip is much safer, as it works correctly on all systems. I suppose technically this is gzip, so that's fine. I guess. Pretty obviously not what the question asked for though.
If you don't have zip and unzip packages installed and you have java, you can use jar to unzip: jar -xf file. Not my server, no unzip, zip, 7z, nothing And this worked. This is a great tip. We need jdk in advance to execute this command.
Compressing: 7za a archive. If you want to use the same compression algorithm with your tarballs, use the -J switch with tar : tar cJf archive. Bob 1 1 silver badge 12 12 bronze badges. I should perhaps append this answer with atool , it's a nice little tool that makes using many different compressors more comfortable.
Bind that to a and creating an archive becomes a arc. Starfish Starfish 3 3 silver badges 12 12 bronze badges. I know this is an old thread but this is the best answer.
Doesn't talk about 7z or tar, its concise and straight to the point — Kyle. BSD Tar can also do this bsdtar -a -c -f sunday. Zombo Zombo 5, 5 5 gold badges 39 39 silver badges 58 58 bronze badges. BSD tar has the benefit of supporting quite a few additional compression formats compared to GNU tar and other tar s. The greatest benefit is, perhaps, that it does so while using a tar -like syntax.
You can surely use 7z , unrar , unzip , etc from the commandline, but they use a different syntax. Prajwal Dhatwalia 1 1 gold badge 7 7 silver badges 10 10 bronze badges. Does pax support zip archives? Nope and it doesn't support pax archives either!
This covers only extraction. Stephen Kitt k 45 45 gold badges silver badges bronze badges. The lowercase option allows you to extract files in lower case regardless of how the file name was originally archived. To force the file names to be extracted in lowercase, use the following example:. The id option restores files' original ownership when extracting. To use the id option, you must be either the super user or the user listed in the archive as the owner of the file. The owner option can be used when adding or extracting files.
The following example specifies both. It sets the owner to jon and the group to eng. When adding files, you can use the option to mask off your ownership information. For example, the following command line marks files as owned by the root account.
To use the owner option when extracting, you must be either the super user or the user listed in the archive as the owner of the file. The times option allows you to preserve the access, creation and modification times of the extracted files.
Specify the sub-option all to preserve all times, use access to preserve the access times only, use modify to restore the time of last modification times or create to restore the creation times. If you stored directory path information within a. ZIP file, you can re-create those directory paths when you extract the files. For example, if you compressed a file called apples. To re-create directories, use the directories option with the extract command, as in the following example:.
When you use this command, all directories that were stored in the. ZIP file will be retained during extraction. The directory path stored is appended to the directory in which you extract the files. PKZIP allows you to specify the sort order of files that are compressed in a. ZIP file or extracted into a destination directory. For example, if you wish to extract files in a specified sort order by date , you would type the following and press ENTER:.
In this example, all files that exist in the test. For more information on sort options, see the Command Reference page. PKZIP gives you the option of displaying specific files contained in a. ZIP file to your computer monitor. In this example, all files with a.
Since many. ZIP files contain an information document such as readme. ZIP file without requiring you to extract a file or file s to your hard drive. Note: You can also use the console and silent options to redirect files to pipe files directly to another program. You can use a list file to specify files to extract from an archive. In the list file, specify file and path name information to identify the target files. For example, entries like the four below are permitted:.
How you identify files in an archive depends on the path information that was archived with them. In an archive, path information is treated as part of a file name for purposes of identification. For example, it would get these files:. Do not use drive letters in a list file used to extract.
Drive letters are not saved with other path information in an archive and are not allowed in extraction list file entries. To specify a list file to use to extract, prefix the pathname of the list file with the character on the command line after the name of the archive. For example, the following line extracts using list file mylist. See the listfile option for information on using this option to create a list file.
See the view option for information on viewing path information saved in an archive. Default Values for Commands and Options Commands and options that have sub-options generally have a default value. Extracting New and Existing Files You don't have to extract all the files included in a. PKZIP provides several ways to choose which files to extract. Extracting Passphrase-Protected Files To extract files from a passphrase-protected archive, use the extract command with the passphrase option.
For example: pkzipc -extract -passphrase test. Note: Passphrases are case sensitive. If you do not specify the passphrase option when extracting an archive that contains passphrase-protected files, PKZIP prompts you as if you had included the passphrase command. Type the passphrase preceded by an equal sign as part of your command. Message Explanation What to do? Signature is invalid The file or archive has changed since it was signed.
The archive may be corrupt. If a file has an invalid signature, then the file may have been modified. Certificate is not trusted The certificate used to sign is currently not to be trusted. Certificate is expired The certificate has expired perhaps because the archive was signed a long time ago. Contact the owner of the certificate. Certificate is revoked Indicates the issuer has revoked the certificate.
Contact the issuer or owner of the certificate. Certificate not found: XXX The certificate for the signature could not be found on your system. Check to see if the certificate name was misspelled.
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