sed: insert text after specific character in a specific line
Below is my text file:
example.txt
INTERFACESv4=""
INTERFACESv6=""
Below is my code (it inserts an IP address after the 14th character):
ip_add="192.168.1.2"
file_name="$HOMEDocumentsexample.txt"
sed -i "s/^(.{14})/1${ip_add4}/" "$file_name"
Below is the output of my text file:
example.txt
INTERFACESv4="192.168.1.2"
INTERFACESv6="192.168.1.2"
How do I insert the text in just the first line?
linux sed
edited 5 mins ago
Jeff Schaller
42.5k1158135
asked 9 mins ago
I.T. G.I.T. G.
1
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Below is my text file:
example.txt
INTERFACESv4=""
INTERFACESv6=""
Below is my code (it inserts an IP address after the 14th character):
ip_add="192.168.1.2"
file_name="$HOMEDocumentsexample.txt"
sed -i "s/^(.{14})/1${ip_add4}/" "$file_name"
Below is the output of my text file:
example.txt
INTERFACESv4="192.168.1.2"
INTERFACESv6="192.168.1.2"
How do I insert the text in just the first line?
linux sed
edited 5 mins ago
Jeff Schaller
42.5k1158135
asked 9 mins ago
I.T. G.I.T. G.
1
New contributor
I.T. G. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Below is my text file:
example.txt
INTERFACESv4=""
INTERFACESv6=""
Below is my code (it inserts an IP address after the 14th character):
ip_add="192.168.1.2"
file_name="$HOMEDocumentsexample.txt"
sed -i "s/^(.{14})/1${ip_add4}/" "$file_name"
Below is the output of my text file:
example.txt
INTERFACESv4="192.168.1.2"
INTERFACESv6="192.168.1.2"
How do I insert the text in just the first line?
linux sed
edited 5 mins ago
Jeff Schaller
42.5k1158135
asked 9 mins ago
I.T. G.I.T. G.
1
New contributor
I.T. G. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Below is my text file:
example.txt
INTERFACESv4=""
INTERFACESv6=""
Below is my code (it inserts an IP address after the 14th character):
ip_add="192.168.1.2"
file_name="$HOMEDocumentsexample.txt"
sed -i "s/^(.{14})/1${ip_add4}/" "$file_name"
Below is the output of my text file:
example.txt
INTERFACESv4="192.168.1.2"
INTERFACESv6="192.168.1.2"
How do I insert the text in just the first line?
linux sed
linux sed
edited 5 mins ago
Jeff Schaller
42.5k1158135
asked 9 mins ago
I.T. G.I.T. G.
1
New contributor
I.T. G. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 5 mins ago
Jeff Schaller
42.5k1158135
asked 9 mins ago
I.T. G.I.T. G.
1
New contributor
I.T. G. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 5 mins ago
Jeff Schaller
42.5k1158135
edited 5 mins ago
Jeff Schaller
42.5k1158135
edited 5 mins ago
Jeff Schaller
42.5k1158135
42.5k1158135
asked 9 mins ago
I.T. G.I.T. G.
1
New contributor
I.T. G. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 9 mins ago
I.T. G.I.T. G.
1
asked 9 mins ago
I.T. G.I.T. G.
1
1
New contributor
I.T. G. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
I.T. G. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I.T. G. is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
1 Answer
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The minimal change would be to force the command to execute only on line 1:
sed -i "1s/^(.{14})/1${ip_add4}/" "$file_name"
You might consider a stricter search pattern if you only want to change the value for INTERFACESv4, no matter what line that value appears on:
sed -i "s/INTERFACESv4=.*/INTERFACESv4=${ip_add4}/" "$file_name"
answered 2 mins ago
Jeff SchallerJeff Schaller
42.5k1158135
add a comment |
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1 Answer
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1 Answer
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active
oldest
votes
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votes
active
oldest
votes
The minimal change would be to force the command to execute only on line 1:
sed -i "1s/^(.{14})/1${ip_add4}/" "$file_name"
You might consider a stricter search pattern if you only want to change the value for INTERFACESv4, no matter what line that value appears on:
sed -i "s/INTERFACESv4=.*/INTERFACESv4=${ip_add4}/" "$file_name"
answered 2 mins ago
Jeff SchallerJeff Schaller
42.5k1158135
add a comment |
The minimal change would be to force the command to execute only on line 1:
sed -i "1s/^(.{14})/1${ip_add4}/" "$file_name"
You might consider a stricter search pattern if you only want to change the value for INTERFACESv4, no matter what line that value appears on:
sed -i "s/INTERFACESv4=.*/INTERFACESv4=${ip_add4}/" "$file_name"
answered 2 mins ago
Jeff SchallerJeff Schaller
42.5k1158135
add a comment |
The minimal change would be to force the command to execute only on line 1:
sed -i "1s/^(.{14})/1${ip_add4}/" "$file_name"
You might consider a stricter search pattern if you only want to change the value for INTERFACESv4, no matter what line that value appears on:
sed -i "s/INTERFACESv4=.*/INTERFACESv4=${ip_add4}/" "$file_name"
answered 2 mins ago
Jeff SchallerJeff Schaller
42.5k1158135
The minimal change would be to force the command to execute only on line 1:
sed -i "1s/^(.{14})/1${ip_add4}/" "$file_name"
You might consider a stricter search pattern if you only want to change the value for INTERFACESv4, no matter what line that value appears on:
sed -i "s/INTERFACESv4=.*/INTERFACESv4=${ip_add4}/" "$file_name"
answered 2 mins ago
Jeff SchallerJeff Schaller
42.5k1158135
answered 2 mins ago
Jeff SchallerJeff Schaller
42.5k1158135
answered 2 mins ago
Jeff SchallerJeff Schaller
42.5k1158135
answered 2 mins ago
Jeff SchallerJeff Schaller
42.5k1158135
42.5k1158135
add a comment |
add a comment |
I.T. G. is a new contributor. Be nice, and check out our Code of Conduct.
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