Mount point bind issues Post: 302994503

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Top Forums UNIX for Beginners Questions & Answers Mount point bind issues Post 302994503 by drysdalk on Thursday 23rd of March 2017 02:57:47 PM

03-23-2017

Registered User

Hi,

Your syntax is basically correct, as far as I can tell. Here's the results of a test on my own system, running Ubuntu 16.04 x86_64:

Code:

$ pwd
/home/unixforum/271681
$ ls
path1  path2
$ ls path1
doc1.pdf  file1.txt  image1.jpeg  sheet1.xlsx
$ ls path2
$ sudo /bin/mount --bind /home/unixforum/271681/path1 /home/unixforum/271681/path2
$ ls path1
doc1.pdf  file1.txt  image1.jpeg  sheet1.xlsx
$ ls path2
doc1.pdf  file1.txt  image1.jpeg  sheet1.xlsx
$ mount | grep unixforum
/dev/sda2 on /home/unixforum/271681/path2 type ext4 (rw,relatime,errors=remount-ro,data=ordered)
$ sudo /bin/umount /home/unixforum/271681/path2
$ ls path1
doc1.pdf  file1.txt  image1.jpeg  sheet1.xlsx
$ ls path2
$

Asf for the fstab entry, the syntax seems fine here too. Again, a test, this time doing the mounting with an fstab entry.

Code:

$ tail -1 /etc/fstab
/home/unixforum/271681/path1    /home/unixforum/271681/path2    bind    bind    0 0
$ ls path1
doc1.pdf  file1.txt  image1.jpeg  sheet1.xlsx
$ ls path2
$ sudo /bin/mount /home/unixforum/271681/path2
$ ls path1
doc1.pdf  file1.txt  image1.jpeg  sheet1.xlsx
$ ls path2
doc1.pdf  file1.txt  image1.jpeg  sheet1.xlsx
$ sudo /bin/umount /home/unixforum/271681/path2
$ ls path1
doc1.pdf  file1.txt  image1.jpeg  sheet1.xlsx
$ ls path2
$

So I'm not sure why this isn't working on your own system. Certiainly on my own local box, this syntax works fine, and I didn't really have to change anything you were doing.

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LEARN ABOUT REDHAT

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)

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