How can I search and change an specific string in a file
Dear All,
New to Linux/Unix OS, my Linux version is 2010 x86_64 x86_64 x86_64 GNU/Linux
As titled, I wonder if you can help to provide a solution to find and change an specific string in a file
The file include a lots of data in following configuration but might be various in different case.
Code:
c 1 0 0 0
c 2 0 0.99999997 0
c 3 0.99999997 0 0
c 4 0.99999997 0.99999997 0
c 5 0 -0.19999999 0
c 6 0.99999997 -0.19999999 0
e 1 2 1 0
e 2 4 2 0
e 3 3 4 0
e 4 5 6 2
e 5 1 5 0
e 6 6 3 0
e 7 3 1 0
r 1 silicon
r 2 oxide
t 1 1 1 3 2 2 -1024 4
t 2 1 3 4 2 -1024 1 -1024
t 3 2 1 5 6 -1022 4 -1024
t 4 2 1 6 3 -1024 1 3
What I want is to find the line which meets following criteria
1. Start with letter 't'
2. Having both string 3 and 4 in the middle three positions
3. Having string -1024 in the rear three positions
Only one line should meet said criteria, e.g.
Code:
t 2 1 3 4 2 -1024 1 -1024
(criteria are highlighted in red font)
I want to find it and change one of the '-1024' into '-1022' e.g.
Code:
t 2 1 3 4 2 -1024 1 -1022
(change are highlighted in blue font)
Thank you and I look forward to your elegant advice.
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Last edited by Corona688; 09-20-2012 at 12:12 PM..
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LEARN ABOUT PHP
set_color
set_color(1) fish set_color(1)NAME
set_color - set_color - set the terminal color
set_color - set the terminal color
Synopsis
set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]
Description
Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
cyan, white and normal.
o -b, --background Set the background color
o -c, --print-colors Prints a list of all valid color names
o -h, --help Display help message and exit
o -o, --bold Set bold or extra bright mode
o -u, --underline Set underlined mode
o -v, --version Display version and exit
Calling set_color normal will set the terminal color to whatever is the default color of the terminal.
Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
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set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
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Version 1.23.1 Sun Jan 8 2012 set_color(1)
09-20-2012
