1. The control goes into 4 while loops and the innermost 2 while loops don't know what to read from. And hence your script fails to do what it was intended to do.
2. And, opening the file with cat and then passing on the data to the subshell and subsequently to the while loop is not an efficient way of reading a file line by line.
Please try this and let us know your observations:
Hi
This works almost as I wish, but not exatly:
for i in `cat names.log`; do grep $i combined2.log | awk '{print $8}' | grep $i | sort -u | head -8 ;done
This works with 8 lines for each pattern in names.log file. But i need to read number of lines from second file, say count.log. I've... (3 Replies)
I have hundreds of small files in csv format. I want to read them one at a time, insert the data into a table and then delete it.
data1 to data999.txt files needs to be read and data to be added to a table.
mysql -e"LOAD DATA INFILE 'data1.txt' INTO TABLE my_table;"
if echo $? = 0 then rm... (1 Reply)
hello there
the problem i got: i need to list .rrd files in each sub-directory from the parent directory, then create .xml files for each rrd files, the xml file should be in the same subdirectoryas rrd file.
i have tried
ls |awk '{print... (3 Replies)
Hi All,
I would like to read the contents of two files using a loop but it doesn't seem to be working. Please have a look at the following script and help me resolve the problem.
While read Rec, Rec1
do
echo $Rec
echo $Rec1
---
----
---
done < file1, file2
I also tried this
... (8 Replies)
Here my problem.
As a root i created a file, and added the content to the file. Now i want to make this file as read only file for all the user including root. Some how i need to protect this file from all users.I tried using the sticky bit. It works for directories. Do any one have idea how to... (8 Replies)
Hi the following c-code utilizing the 'read()' man 2 read method cant read in files larger that 2gig.
Hi I've found a strange problem on ubuntu64bit, that limits the data you are allowed to allocate on a 64bit platform using the c function 'read()'
The following program wont allow to allocate... (14 Replies)
i have the following files with content
file a content;
1234|wert|
file b content;
2345|byte|
file c content;
9999|kilo|
i want to read the contents of three files seperately and for each of them select the first column and output below
welcome 1234
welcome 2345
welcome... (6 Replies)
Hi. I have a cron job running nmon -X & collecting info into the files nmon.$month$date. Files owned by root ( as the job owner ) . What is the best way to make them automatically readable for everyone. The files stored in the folder
bash-3.2$ ls -ld /system_performance/nmon_logs
drwxrwxrwx 2... (2 Replies)
Hi
i am looking a way to look at a log file(log.txt) from the last time I've read it.
However after some days the main log file(log.txt) is rename to (log.txt.1).
So now i will have two log files as below.
log.txt.1
log.txt
Now, i have to read the log from the point where i have left... (3 Replies)
HI,
I am trying to implement a simple shell script program that does not make use of ls or find commands as they are quite expensive on very large sets of files. So, I am trying to generate the file list myself. What I am trying to do is this:
1. Generate a file name using shell script, for... (2 Replies)
Discussion started by: shoaibjameel123
2 Replies
LEARN ABOUT LINUX
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)