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Top Forums Shell Programming and Scripting [Solved] Problem with if-then-else loop Post 302847101 by kshji on Monday 26th of August 2013 10:02:51 AM
Old 08-26-2013
If input file is long, then it's better to use io redirect. I use always while + read when use file input.
Code:
while read i xstr
do
        if [  "$i"  =  "10.155.249.173" ]; then
                echo "found ip"
        else
                echo "not found ip"
        fi
done < list_ip_switch

Why read i xtsr ?
It's not have to, but:
if line include ip and something else then 1st value is in the i and rest of line is in the xtsr.
 

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line(1) 						      General Commands Manual							   line(1)

NAME
line - Reads one line from standard input SYNOPSIS
line STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: line: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
None DESCRIPTION
The line command copies one line, up to and including a newline, from standard input and writes it to standard output. Use this command within a shell command file to read from your terminal. The line command always writes at least a newline character. NOTES
The line utility has no internationalization features and is marked LEGACY in XCU Issue 5. Use the read utility instead. EXIT STATUS
Success. End-of-File. EXAMPLES
To read a line from the keyboard and append it to a file, enter: echo 'Enter comments for the log:' echo ': c' line >>log This shell procedure displays the message: Enter comments for the log: It then reads a line of text from the keyboard and adds it to the end of the file log. The echo ': c' command displays a : (colon) prompt. See the echo command for information about the c escape sequence. SEE ALSO
Commands: echo(1), ksh(1), read(1), Bourne shell sh(1b), POSIX shell sh(1p) Functions: read(2) Standards: standards(5) line(1)
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