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tar command

OpenBSD Install Ports Tree Collection

I have installed OpenBSD operating system but ports collection is missing at /usr/ports directory. How do I install ports from ftp / http site under OpenBSD?
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Q. How do I extract a single file or directory form a tarball under UNIX / Linux shell prompt? How do I restore a single file from /dev/st0 tape device?
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Q. I've download ed .tbz file. How do I open .tbz file under Linux / UNIX operating system using a shell prompt or GUI application?
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Extract tar.gz File

I have downloaded a file called foo.tar.gz from the Internets. How do I extract tar.gz file under Linux / UNIX like operating systems using command line options?
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List The Contents Of a tar.bz2 Tarball File

How do I list the contents of a tar.bz2 file under Linux or UNIX-linke operating systems using a shell prompt?
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Q. One of my responsibilities is backing up UNIX server. How do I backup data under HP-UX UNIX? How do I use mt, fbackup and frecover commands to perform full and incremental backups?
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Linux Set the Block Size for a SCSI Tape Device

Q. I've Debian Linux 4.0 Install on HP Server. This server has SCSI tape device. According to my tape documentation size should be 64k. How can I set the block size for a HP SCSI tape device?
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