Command-line options
You can specify the compression level of a directory using command-line options. The -v option requests verbose diagnostic information about the zipfile’s structure. This option works even if stdout is redirected to a file, so you can easily save diagnostic information for bug reports. You can also specify the version number of the program. This will tell you the version number of Info-ZIP, the release date, and its home and distribution sites. In addition, you can specify the compiler type and operating system.
The -s option allows you to create split archives in the current directory. Split mode updates splits as the archive is created, so you can write them to removable media if you wish. If you use this option, however, remember to set the destination directory to a writable device, as the split archives are not readable by all unzipping programs.
You can also use the -dd option to show the file size with dots. This option works only on Windows systems. It displays the file size in m, which can be k (KB), m (MB), g (GB), or t (TB). However, if you do not want to see the file size, you can also use the -v option to disable the dots.
The -r option adds hidden files. Unlike -l, it doesn’t remove empty directories, so you need to specify an empty one. This option can save disk space, but it can also be dangerous, so it should be used with care.
Exclusions
There are several options for excluding files and directories when zipping a directory. For example, you can enter -xr to exclude all directories with a certain name. However, if you’re using the bash shell, you have to include quotes for excluding.
Zip also allows multiple files with the same name. This can cause problems for the user. To avoid this problem, make sure that you set the duplicate attribute for each file. You can do this by defining the file’s name, then specifying “.svn”. If you’re not sure how to do this, check out the zip man page.
When zipping a directory, you can also specify the pattern that you want to use to exclude files. This will make the archive contain only those files that are named in the pattern you specify. If the pattern doesn’t match any files, the file is skipped, and you’ll get a warning message. Otherwise, you can continue creating the archive.
Exclusions when zipping a directory can be applied to subdirectories as well. In Mac OS X, this option is included as part of the zip command and is easy to use. It’s a useful option for power users who want to make their files and directories secure. You can even apply password protection to zip files.
The -F option can also be used to repair missing portions of a zip archive. However, you must make sure that the central directory is not damaged in any way, otherwise the archive will not be valid.
Time lapsed
The zip command can take a long time to complete because it needs to locate the files or establish a network connection. If it fails to find a file, it will issue a warning. However, it will still complete the request. It will also let you know how many files were skipped.
Compression level
When zipping a directory, there are a number of factors that should be considered when choosing the compression level. One of the most important factors is the size of the archive. This size determines how much data is compressed. Generally, the smaller the size, the better. ZIP files are also a good choice for smaller file sizes.
ZIP file compression requires the use of extra fields. Some of these fields are system-specific, while others are applicable to any operating system. When using this option, you’ll want to avoid the default setting (-X). Using -X will strip these extra fields and only save the files that are compressed. This will also strip off any file extensions that are not recognized by the zip utility.
When zipping a directory, you can choose the compression level from -6 to nine. By default, zip uses ‘-6’, but you can also specify ‘-9’ to force it to use optimized compression. However, it is important to remember that this option is only useful if you know exactly which files you want to compress.
-ds: The -ds option allows you to control how many dots appear in the output. It is important to note that -ds is case-sensitive for the name of the zip archives, so you should enter filenames in upper case. -v, on the other hand, ignores case when compressing the directory.
-Zipping a directory requires a certain compression level. This will ensure that the files are smaller than they would otherwise be. -Zip has built-in support for Mac OS X. It is a useful tool for packaging and archiving files. It also saves disk space.
