Jim Zemlin is executive director of the Linux Foundation claims Solaris UNIX is irrelevant and Linux is future. From the article:
Linux is enjoying growth, with a contingent of devotees too large to be called a cult following at this point. Solaris, meanwhile, has thrived as a longstanding, primary Unix platform geared to enterprises.
Sun officials believe the 16-year-old Solaris platform remains a pivotal, innovative platform. But at the Linux Foundation, there is a no-conciliatory stance; the attitude there is to tell Solaris and Sun to move out of the way. "The future is Linux and Microsoft Windows," says foundation Executive Director Jim Zemlin. "It is not Unix or Solaris."
Is Sun Solaris on its deathbed?
Sure Linux has great value but Solaris has its own market share. They make great OS with good features such as DTrace, ZFS and many more. Many government and defense project selects Solaris for Database and many mission critical applications, while Linux used for Web, mail and proxy services.
What do you think?
This article describes key features of PostgreSQL 8.2, which have been available in OpenSolaris since build 66. You know the PostgreSQL logo is an elephant: Find out why the PostgreSQL 8.2 features in OpenSolaris are huge.
PostgreSQL in the OpenSolaris OS
Tar name come from Tape ARchiver. It is both a file format and the name of the program used to handle such file. Tar archive files have names ending in ".tar". If an archive is compressed, the compression program adds its own suffix as usual, resulting in filename endings like ".tar.Z", ".tar.gz", and ".tar.bz2". Tar doesn't require any particular filename suffix in order to recognize a file as an archive. Tar was originally created for backups on magnetic tape, but it can be used to create tar files anywhere on a filesystem. Archives that have been created with tar are commonly referred to as tarballs.
Create a new set of backup
To create a Tar file, use tar command as follows:
# tar cvf /dev/rmt/X file1 file2 dir1 dir2 file2 …
- c – Create a new files on tape/archive
- v – verbose i.e. show list of files while backing up
- f – tape device name or file
For example, backup /export/home/vivek/sprj directory to tape device /dev/rmt/0, enter
# tar cvf /dev/rmt/0 /export/home/vivek/sprj/
Remember c option should only use to create new set of backup.
Appending or backing up more files to same tape using tar
tar provides r option for appending files to tape. For example to backup /data2/tprj/alpha1 files to same tape i.e. appending files to a first tape device:
# tar rvf /dev/rmt/0 /data2/tprj/alpha1/*
- r – append files to the end of an archive/tape
List files on a tape using tar command
To display file listing of a first tape use tar as follows:
# tar tvf /dev/rmt/0
To listing the Contents of a Stored Directory (for example wwwroot directory):
# tar tvf /dev/rmt/0 wwwroot
- t – list the contents of an archive/tape
Retrieve / restore tape backup taken with tar
1) Use tar command as follows to retrieve tape drive backup to current directory:
(a) Change directory where you would like to restore files:
# cd /path/to/restore
(b) Now, do a restore from tape:
# tar xvf /dev/rmt/0
To specify target directory use –C option
Restore everything to /data2 directory:
# tar xvf /dev/rmt/0 –C /data2
To retrieve directory or file use tar as follows:
# tar xvf /dev/rmt/0 tprj
Note that Solaris tar command is little different from GNU tar, if you wish to use gnu tar with Solaris use command gtar. Gnu tar accepts same command line options plus bunch of additional options :)
See Sun Solaris tar man page and tapes ~ creates /dev entries for tape drives attached to the system.