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Full Discussion: testing variables issue
Top Forums UNIX for Dummies Questions & Answers testing variables issue Post 302578313 by flw521521 on Thursday 1st of December 2011 09:54:38 AM
Old 12-01-2011
testing variables issue

oh,i don't understand
my shell file like this
Code:
#!/bin/sh
#
#
testnum=$(ifconfig eth0|sed -n 8p|awk '{print $2}'|cut -c7-)
echo $testnum
sleep 2
echo $testnum
sleep 2
echo $testnum
sleep 2
echo $testnum

but the output was always the same value
like
Code:
[root@localhost test]# ./test.sh
3779052732
3779052732
3779052732
3779052732

why?
 

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SHAPELIB(1)							   User Commands						       SHAPELIB(1)

NAME
shptest - create some shapefiles for testing SYNOPSIS
shptest num DESCRIPTION
Writes out a shapefile consisting of files testnum.shp and testnum.shx in the current directory. The num argument specifies the type of shapes in the shapefile to create and takes values from: 0 NullShape 1 Point 2 PointZ 3 PointM 4 MultiPoint 5 MultiPointZ 6 MultiPointM 7 Arc 8 ArcZ 9 ArcM 10 Polygon 11 PolygonZ 12 PolygonM 13 MultiPatch EXIT STATUS
0 Successful program execution. 1 Missing argument. 10 Test `num' not recognised. DIAGNOSTICS
The following diagnostics may be issued on stdout: Test `num' not recognised. AUTHORS
Frank Warmerdam (warmerdam@pobox.com) is the maintainer of the shapelib shapefile library. Joonas Pihlaja (jpihlaja@cc.helsinki.fi) wrote this man page. SEE ALSO
dbfadd(1), dbfcreate(1), dbfdump(1), dbf_dump(1), shpcreate(1), shpdump(1), shprewind(1) shapelib OCTOBER 2004 SHAPELIB(1)
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