06-11-2016
Let's get some terms right, as from reading your post I get the feeling not all is crystal clear to you:
df -h does not "load filesystem in OS level", it "... displays the amount of disk space available on the file system ...". A look at man df might help.
vi is one among many text editors. It does not execute scripts nor programs but allows you to create and modify text files. These, if consisting of commands and shell builtins, are known as scripts and, if having the "executable" permission set, can be executed (better: interpreted) by the shell. Just like commands.
Not having the slightest clue about isql I guess it to be an sql interpreter. You can run it interactively to perform ad hoc queries etc., or have it read and interpret sql scripts. One among others is the way you show in post#1 using a "here document".
I'd propose to prepare a shell script very similar to the one in post#1, make it executable, test it interactively, and, when happy with it, run it using su's -c option.
EDIT: Looks like my post crossed your recent update of your post...
Last edited by RudiC; 06-11-2016 at 09:34 AM..
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NAME
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SYNOPSIS
mattrib - change MSDOS file attribute flags
mcd - change MSDOS directory
mcopy - copy MSDOS files to/from Unix
mdel - delete an MSDOS file
mdir - display an MSDOS directory
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mren - rename an existing MSDOS file
mtype - display contents of an MSDOS file
mwrite - low level write (copy) a Unix file to MSDOS
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from the shell.
The regular expression "pattern matching" routines follow the Unix-style rules. For example, '*' matches all MSDOS files in lieu of '*.*'.
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All options use the '-' (minus) flag, not '/' as you'd expect in MSDOS.
The mcd command is used to establish the device and the current working directory (relative to the MSDOS filesystem), otherwise the default
is assumed to be A:/.
SEE ALSO
mattrib(1), mcd(1), mdel(1), mformat(1), mrd(1), mren(1), mtype(1), mcopy(1), mdir(1), mlabel(1), mmd(1), mread(1), mwrite(1)
BUGS
An unfortunate side effect of not guessing the proper device (when multiple disk capacities are supported) is an occasional error message
from the device driver. These can be safely ignored.
local MTOOLS(1)