i forgot to keep them together like so
I just don't understand the difference between the two, when i use both. they "appear" to do the same thing. like what is the point of using "+" or "-" when "=" does the same thing, if i'm getting at this right.
i want:
user: to read,write, and execute.
group: to read and execute.
other: to only read.
Can anyone help explain the "s" in the below permissions example. I was reading about the "sticky bit" (t) but I am a little confused.
On file "test"
wolf% chmod 4777 test
wolf% ls -l
total 4
drwx------ 2 john staff 512 Mar 19 21:34 nsmail
-rwsrwxrwx 1 john staff ... (2 Replies)
Hi everyone, I'm looking for some information concerning Unix permissions. I am new to Unix and am doing research for a graduate class. Given the permissions below, can anyone give me five unique exploits that would be available to a hacker/cracker given this configuaration?
-rw-rw-rw- 1... (1 Reply)
I saved a perl code in xemacs. I used an xterminal to execute it but unix said that I don't have permission. I saved the files in my home directory. How do I change the permission. This is hat unix said:
-ksh: ./names.pl: cannot execute (5 Replies)
Hey,
We've got quite a strange problem on our hands here. We are running an HP 9000/800 B.11.00.
I've just created a new group in /etc/group which i called, let's say newgroup . Then I added 4 users to the group, namely user1, user2, user3, user4 . The command grpchk shows no strange things... (4 Replies)
Hi,
I am a Unix Admin. I have to give the permissions to a user for creating new file in a directory in HP-Ux 11.11 system since he cannot able to create a new file in the directory.
Thanks in advance.
Mike (3 Replies)
My /tmp is set with the following permissions (777) and a 't' at the end.
My umask is set to 022.
When I create a directory under /tmp (tmp/xx) it gets created as 755
as expected.
Yet when I create a file within that directory (/tmp/xx/yy) the permissions
are not 755 they are 644.
... (1 Reply)
Hi, I am creating a ksh script to search for a string of text inside files within a directory tree. Some of these file are going to be read/execute only. I know to use chmod to change the permissions of the file, but I want to preserve the original permissions after writing to the file. How can I... (3 Replies)
Hi,
I have noticed that on my Linux box there is a nice feature which make it impossible for specified member (owner, group or other) to have an given access if a member from which we would expect it more don't have that access.
So it is impossible to read file by all if others have set read... (3 Replies)
Hi guys,
i write the below script to make the user get to the directory that interesting. Now what I am trying is to check the permissions of the directory and if the directory exists to check the reading options.
echo "Please enter your desire folder directory ( \yourfolders) ?: \c"
... (9 Replies)
Discussion started by: mikerousse
9 Replies
LEARN ABOUT ULTRIX
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)