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tarring and gzipping dump files

 
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# 1  
Old 07-22-2004
tarring and gzipping dump files
Say I want to transfer several dump files from a Solaris machine onto a Win2k machine for storage. It was suggested that I tar and gzip the dump files before doing so.

Is it completely necessary to use both of these utilities, or is it sufficient to compress multiple dump files into one gzip file? Also, if tar is necessary, what does it do exactly for the files in question?
# 2  
Old 07-23-2004
tar will group all the files in question into one ".tar" file. gzip will do the actual compression.

why not do a man on tar and gzip for more info.
# 3  
Old 07-23-2004
You may also want to use the "mv" utility to rename the compressed archive from ".tar.gz" to ".tgz" so that Winzip can open it.

P.S. I believe GNU tar has a "compress" option.
# 4  
Old 07-23-2004
I have been poring over the man pages. Smilie I think I understand now.

I was under the impression that I could gzip file1 file2 file3 file4 and it would produce a single gzipped file. I guess you have to tar them into one file first. Is this accurate?
# 5  
Old 07-23-2004
In solaris gzip only compresses the files. It will not produced a single gzipped file when presented with multiple files as arguments, it will merely gzip them up individually:
Quote:
Gzip reduces the size of the named files using Lempel-Ziv
coding (LZ77). Whenever possible, each file is replaced by
one with the extension .gz, while keeping the same ownership
modes, access and modification times.
So you are correct. you need to tar the files first.
 
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