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Frequent Advisor


boot lv --- contains boot configuration to boot up the system

so what root lvol and opt used for.
James R. Ferguson
Acclaimed Contributor

Re: root,boot,var


The '/' mountpoint (the "root") contains subordinate directories like '/etc' and '/sbin'. Together these provide configuration scripts and data and commands that are intended for system maintenance in single-user mode when filesystems like '/usr' and '/opt' aren't mounted.

The '/opt' filesystem is for "optional" products. I prefer the term "additional" rather than "optional". The contents of '/opt' extend (add to) the core UNIX software found in '/usr'. In '/opt' you will find things like Perl, aCC, glance, etc.

See 'heir(5)' for more information:


Respected Contributor

Re: root,boot,var


/ Root is the mother of all mount points
and /opt is OS mount point where all the Additional Software which u install lands

Please check the below links,

Hope this solves ur query.
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Vishnu Khandare
You should deserve before U desire!!!!
Honored Contributor

Re: root,boot,var


Please go through,

"UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity" - Dennis Ritchie
Ismail Azad
Esteemed Contributor

Re: root,boot,var

Root logical volume is typically /dev/vg00/lvol3 which is present on the boot disk structure and typically contains configuration files and commands which are in /etc and /opt. Opt consists of applications. When you talk about the boot area typically on PA-RISC we refer to the LIF area which consists of ISL, AUTO and HPUX utility and sometimes the pointers to these have to be updated when some maintenance is being done with the help of the command lvlnboot. Lvlnboot also allows us to see the contents of the Boot Data Reserved Area (BDRA).
Read, read and read... Then read again until you read "between the lines".....
Acclaimed Contributor

Re: root,boot,var

As said before, "root" of the file system is just "root" - where everything else starts in the directory tree.

The boot volume is where the kernel is, but boot information is also in a reserved area at the beginning of the disk.

Hope this helps!

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