07-10-2008
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi All,
Please let me know how I can put a comment (e.g // or #) to more than 50 lines using vi editor in a .cpp/.sh file.
Thanks in advance. (3 Replies)
Discussion started by: artikulkarni
3 Replies
2. Shell Programming and Scripting
I have a file that contains the following lines
the brown quick fox
jumped over
the white laze dog
0123456789
I wanted to put the contents of this file into a variable so I used this code:
VAR_LIST=`cat $2`
where $2 is the file name passed as an argument to the script
If I... (3 Replies)
Discussion started by: Nomaad
3 Replies
3. UNIX for Dummies Questions & Answers
Hi all,
I have a file which contains comments,dotted lines(-------),actual records etc.I need to fetch only the actual records and put into a new file neglecting/deleting other rows.I have a header record too which contains the column names for the actual records.i need to discard this too.how... (5 Replies)
Discussion started by: ganesh_248
5 Replies
4. Shell Programming and Scripting
Hello,
Is there any way in awk to put every line of a file in an array and so we can like this print the line we want.
For example, if we have this file
aaa eee
bbb fff
ccc ggg
ddd hhh
So we can print to the output the 3rd line only
ccc ggg
If it is possible, please put the... (7 Replies)
Discussion started by: rany1
7 Replies
5. Shell Programming and Scripting
Hi,
my xml files looks something like this
<Instance Name="New York">
<Description></Description>
<Instance Name="A">
<Description></Description>
<PropertyValue Key="false" Name="Building A" />
</Instance>
<Instance Name="B">
... (4 Replies)
Discussion started by: tententen
4 Replies
6. Shell Programming and Scripting
Dear all,
I'm trying to manipulate a data file and putting a certain lines into one paragraph.
What am I actually want to do is that search some lines in a data file. These lines begin with "1\1\GINC-" and end with "\\@" or the following two empty lines as shown in blue.
A part of the text... (11 Replies)
Discussion started by: liuzhencc
11 Replies
7. Programming
hi
I need a little help writing this small perl script. I'm trying to extract the values from each line in a file and find the average for example
cat school
Highschool 100, 123, 135
Middleschool 41, 67, 54
Elementary 76, 315, 384
./average.pl
highschool: 119.3
middleschool: 54... (2 Replies)
Discussion started by: gengar
2 Replies
8. Shell Programming and Scripting
Hi all, I'm quite newbie in shell scripting but I found a problem what I cant solve.
I have a .txt file which looks like this:
/22/
/23/
/24/
and so on and I'd need to make it look like this:
/22/|/23/|/24/|...and so on.
these numbers are growing and has lines like this /2a/ as well.... (15 Replies)
Discussion started by: gergo235
15 Replies
9. Shell Programming and Scripting
I really can't figure this one out.
I have 2 files, one file is a list of hostnames and the other is a list of their corresponding IPs:
fileA:
example.com
another.org
thirdie.net
fileB:
1.1.1.1
2.2.2.2
3.3.3.3
I want to create a fileC that looks like:
example.com 1.1.1.1... (2 Replies)
Discussion started by: zstar
2 Replies
10. Shell Programming and Scripting
Hello,
I haven't been here for a while and I might be forgetting some things.
I have an input text like this
titleA
http://myurl/bla/blabla/1234
http://myurl/bla/blabla/6789
titleB
http://myurl/bla/blabla/5678
http://myurl/bla/blabla/1234
titleC
http://myurl/bla/blabla/9123... (10 Replies)
Discussion started by: Kibou
10 Replies
LEARN ABOUT REDHAT
fb.modes
fb.modes(8) Linux frame buffer utils fb.modes(8)
NAME
fb.modes - frame buffer modes file
DESCRIPTION
/etc/fb.modes contains an unlimited number of video mode descriptions. The general format of a video mode is:
mode
geometry <xres> <yres> <vxres> <vyres> <depth>
timings <pixclock> <left> <right> <upper> <lower> <hslen> <vslen>
options <value>
endmode
OPTIONS
geometry options:
xres visible horizontal resolution (in pixels)
yres visible vertical resolution (in pixels)
vxres virtual horizontal resolution (in pixels)
vyres virtual vertical resolution (in pixels)
depth display depth (in bits per pixel)
timing options:
pixclock
length of one pixel (in picoseconds)
left left margin (in pixels)
right right margin (in pixels)
upper upper margin (in pixel lines)
lower lower margin (in pixel lines)
hslen horizontal sync length (in pixels)
vslen vertical sync length (in pixel lines)
other options:
the first value of this options is the default
hsync {low|high}
the horizontal sync polarity
vsync {low|high}
the vertical sync polarity
csync {low|high}
the composite sync polarity
extsync {false|true}
enable or disable external resync. If enabled the sync timings are not generated by the frame buffer device and must be pro-
vided externally instead. Note that this option may not be supported by every frame buffer device
laced {false|true}
enable or disable interlace. If enabled the display will be split in two frames, each frame contains only even and odd lines
respectively. These two frames will be displayed alternating, this way twice the lines can be displayed and the vertical fre-
quency for monitor stays the same, but the visible vertical frequency gets halved
double {false|true}
enable or disable doublescan. If enabled every line will be displayed twice and this way the horizontal frequency can easily
be doubled, so that the same resolution can be displayed on different monitors, even if the horizontal frequency specifica-
tion differs. Note that this option may not be supported by every frame buffer device
INTERNALS
Generally a frame buffer display is organized as follows:
+---+---------------+---+---+
| | ^ | | |
| | | 5 | | |
| | v | | |
+---#################---+---+
| # ^ # | |
| # | # | |
| # | # | |
| 1 # | 2 # 3 | 4 |
|<->#<------+------>#<->|<->|
| # | # | |
| # | 6 # | |
| # | # | |
| # v # | |
+---#################---+---+
| | ^ | | |
| | | 7 | | |
| | v | | |
+---+---------------+---+---+
| | ^ | | |
| | | 8 | | |
| | v | | |
+---+---------------+---+---+
1 left margin
2 xres
3 right margin
4 horizontal sync len
5 upper margin
6 yres
7 lower margin
8 vertical sync len
The area bordered with `#' is the visible display area. Horizontal and vertical frequencies can now easily be calculated, for this the sum
of horizontal or vertical values are important
htotal = left + xres + right + hslen
vtotal = upper + yres + lower + vslen
The length of one line can now be calculated with pixclock
line = pixclock * htotal
and we have the horizontal frequency
hfreq = 1E12 / line = 1E12 / (pixclock * htotal)
To get the vertical frequency vtotal must eventually adjusted. If the display is laced, vtotal must be halved or if the display is a dou-
blescan one, vtotal must be doubled. Now we can calculate the length of one frame
if (lace) vtotal /= 2
if (double) vtotal *= 2
frame = vtotal * line
and we get also the vertical frequency
vfreq = 1E12 / frame = hfreq / vtotal
SEE ALSO
fbset(8), fbdev(4)
local Aug 1996 fb.modes(8)