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Top Forums Shell Programming and Scripting What this switch of "if" does? Post 302270569 by Myrddin Emrys on Monday 22nd of December 2008 07:55:35 AM
Old 12-22-2008
Quote:
Originally Posted by pritam1980
Hi All

I have a script which is....

if [ "file1.log" -nt "file2.txt" ]
then
touch file2.txt
else
kill -9 `ps -ef | grep -i /opt/xxx/bin/yyy | grep -v grep | awk '{print $2}'`
fi


What does it do? specially what is this logical checking?
if [ "file1.log" -nt "file2.txt" ]
I am not able to understand the "-nt" option...


Thanks in advance

Pritam


Hello Pritam,


[Chapter 13] 13.3 Understanding Shell Scripts




"Read it is good for the mind"
 

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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 font color, while set_color --bold white will result in a white font color. Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator. 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 incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of ncurses and recompile fish against it in order to fix this issue. Version 1.23.1 Sun Jan 8 2012 set_color(1)
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