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Shell Programming and Scripting
Replace line in files using script.
Post 302424401 by Hempe on Tuesday 25th of May 2010 06:51:30 AM
05-25-2010
Replace line in files using script.
First sorry for my bad english.
I have search the forum without finding anything I fully understand, so I ask here.
The problem:
I have a config file that I will chance onece a day. One line only.
I know the linenumber, and I also know the start of the line.
Line number 19, and the start of the line is "H: 10.0.0.9 60110 user1 user1"
I want to replace the whole line with a predefine variable $newline, the rest I have figured out for my self, but now I am stuck...
So... How do I locate the linenumber or the known start of the line, and how do I replace that line with a new line stored in a variable, then save and close the file...
The filename is "debsvr.cfg" and is located in "/var/etc/" on a debian server.
I am pretty new at shell scripting, so if you can please explain so my kid will understand it :P
Many thanks in advance
I have search the forum without finding anything I fully understand, so I ask here.
The problem:
I have a config file that I will chance onece a day. One line only.
I know the linenumber, and I also know the start of the line.
Line number 19, and the start of the line is "H: 10.0.0.9 60110 user1 user1"
I want to replace the whole line with a predefine variable $newline, the rest I have figured out for my self, but now I am stuck...
So... How do I locate the linenumber or the known start of the line, and how do I replace that line with a new line stored in a variable, then save and close the file...
The filename is "debsvr.cfg" and is located in "/var/etc/" on a debian server.
I am pretty new at shell scripting, so if you can please explain so my kid will understand it :P
Many thanks in advance
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SMPTEFrame(3) libltcsmpte SMPTEFrame(3) NAME
SMPTEFrame - Raw 80 bit SMPTE frame. SYNOPSIS
#include <ltcsmpte.h> Data Fields unsigned int frameUnits:4 unsigned int user1:4 unsigned int frameTens:2 unsigned int dfbit:1 unsigned int colFrm:1 unsigned int user2:4 unsigned int secsUnits:4 unsigned int user3:4 unsigned int secsTens:3 unsigned int biphaseMarkPhaseCorrection:1 unsigned int user4:4 unsigned int minsUnits:4 unsigned int user5:4 unsigned int minsTens:3 unsigned int binaryGroupFlagBit1:1 unsigned int user6:4 unsigned int hoursUnits:4 unsigned int user7:4 unsigned int hoursTens:2 unsigned int reserved:1 unsigned int binaryGroupFlagBit2:1 unsigned int user8:4 unsigned int syncWord:16 Detailed Description Raw 80 bit SMPTE frame. Definition at line 140 of file ltcsmpte.h. Field Documentation unsigned int SMPTEFrame::binaryGroupFlagBit1 Definition at line 160 of file ltcsmpte.h. unsigned int SMPTEFrame::binaryGroupFlagBit2 Definition at line 168 of file ltcsmpte.h. unsigned int SMPTEFrame::biphaseMarkPhaseCorrection Definition at line 153 of file ltcsmpte.h. unsigned int SMPTEFrame::colFrm Definition at line 146 of file ltcsmpte.h. unsigned int SMPTEFrame::dfbit Examples: tests/decoder.c. Definition at line 145 of file ltcsmpte.h. unsigned int SMPTEFrame::frameTens Definition at line 144 of file ltcsmpte.h. unsigned int SMPTEFrame::frameUnits Definition at line 141 of file ltcsmpte.h. unsigned int SMPTEFrame::hoursTens Definition at line 166 of file ltcsmpte.h. unsigned int SMPTEFrame::hoursUnits Definition at line 163 of file ltcsmpte.h. unsigned int SMPTEFrame::minsTens Definition at line 159 of file ltcsmpte.h. unsigned int SMPTEFrame::minsUnits Definition at line 156 of file ltcsmpte.h. unsigned int SMPTEFrame::reserved Definition at line 167 of file ltcsmpte.h. unsigned int SMPTEFrame::secsTens Definition at line 152 of file ltcsmpte.h. unsigned int SMPTEFrame::secsUnits Definition at line 149 of file ltcsmpte.h. unsigned int SMPTEFrame::syncWord Definition at line 171 of file ltcsmpte.h. unsigned int SMPTEFrame::user1 Definition at line 142 of file ltcsmpte.h. unsigned int SMPTEFrame::user2 Definition at line 147 of file ltcsmpte.h. unsigned int SMPTEFrame::user3 Definition at line 150 of file ltcsmpte.h. unsigned int SMPTEFrame::user4 Definition at line 154 of file ltcsmpte.h. unsigned int SMPTEFrame::user5 Definition at line 157 of file ltcsmpte.h. unsigned int SMPTEFrame::user6 Definition at line 161 of file ltcsmpte.h. unsigned int SMPTEFrame::user7 Definition at line 164 of file ltcsmpte.h. unsigned int SMPTEFrame::user8 Definition at line 169 of file ltcsmpte.h. Author Generated automatically by Doxygen for libltcsmpte from the source code. Version 0.4.4 Fri Apr 27 2012 SMPTEFrame(3)