I have written following code & ran it on Fedora Linux.
Before executing it I have created a.txt (touch a.txt).
Why contents of a.txt are "ABCDXYZEFGH"?
More precisely, why kernel had not created separate entry in File Table for child process?
What is the reason behind sharing of File Table entry between parent & child process?
I think as child is independent process. Then if it has written at offset 10 then offset will be incremented to 11 but parent offset should remain at 10 only.
Hi there
I have a requirement where i have to globally remove a hosts file entry from all boxes e.g.
10.01.10.1 my_server1
normally for 'in-line' editing of files without passing it out to another fle and copying it back etc which is messy, Ive been using the fantastic "perl -pi... (1 Reply)
Hello everyone,
I want to compare the first line of a file(ABC) with that of a folder,XYZ(folder contents) and want that line to be deleted from the file(ABC) if that entry doesn't exist in the folder(XYZ)
I want to put this in a loop. please can anyone help
thanks (6 Replies)
how do I make sure that the entry in the routing table on Solaris 8 stay permanent after rebooting the server.
For example
route add 172.20.1.60 -netmask 255.255.255.0 172.20.255.253
Each time the server reboots the entry disappears when using the command netstat -nr (2 Replies)
Hi
I am basically checking if a required entry exists within a file. In the code below I am fetching all directories of the format rel1, rela, rel3..etc..The same entries also exist in the sample log file. I want to check if entry in file1 exists within file2 but it is failing. Can you please... (4 Replies)
Hi,
Lets say I have a script which reads a conf file (say MASTERFILE) line by line to fetch file_name, source_path, dest_path. But currently, here the file name are static for eg: ABC.txt or XYZ.txt. So i have hard-coded in the conf file.
So what happens that the script picks up the file_name... (1 Reply)
How would I grep for password file entry without using
grep 'username' /etc/passwd?
perhaps with who?
I want to create alias that will find the password file entry regardless of the user who is using it.
Thanks (4 Replies)
Hello friends, I have a question.
Sometimes I have to search for an entry in a file that is repeated thousands of times. Can you tell me how to search so that i get limited results?
For example:
file: myfile.txt
grep "hello world" myfile.txt
this above grep will generate 5000... (4 Replies)
Hi All,
Please help me and guide me to write a bash/shell script on Linux box to delete parent entry with all their child entries.
example:
Parent is :
----------
dn: email=yogesh.kumar@wipro.com, o=wipro, o=in
child is:
----------
dn: cn: yogesh kumar, email=yogesh.kumar@wipro.com,... (1 Reply)
I have the input file like this.
Input file: 12.txt
1) There are one or more than one <tr> tags in same line.
2) Some tr tags may have one <td> or more tna one <td> tags within it.
3) Few <td> tags having "<td> </td>". Few having more than one " " entry in it.
<tr> some td... (4 Replies)
Discussion started by: thomasraj87
4 Replies
LEARN ABOUT DEBIAN
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)