sed: insert text after specific character in a specific line
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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/" "$file_name"
Below is the output of my text file:
example.txt
INTERFACESv4="192.168.1.2"
INTERFACESv6="192.168.1.2"
How do I insert the text in just the first line?
linux sed
edited Feb 28 at 2:08
Jeff Schaller♦
43.9k1161141
asked Feb 28 at 2:04
I.T. G.I.T. G.
31
add a comment |
Below is my text file:
example.txt
INTERFACESv4=""
INTERFACESv6=""
Below is my code (it inserts an IP address after the 14th character):
ip_add="192.168.1.2"
file_name="$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 Feb 28 at 2:08
Jeff Schaller♦
43.9k1161141
asked Feb 28 at 2:04
I.T. G.I.T. G.
31
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/" "$file_name"
Below is the output of my text file:
example.txt
INTERFACESv4="192.168.1.2"
INTERFACESv6="192.168.1.2"
How do I insert the text in just the first line?
linux sed
edited Feb 28 at 2:08
Jeff Schaller♦
43.9k1161141
asked Feb 28 at 2:04
I.T. G.I.T. G.
31
Below is my text file:
example.txt
INTERFACESv4=""
INTERFACESv6=""
Below is my code (it inserts an IP address after the 14th character):
ip_add="192.168.1.2"
file_name="$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 Feb 28 at 2:08
Jeff Schaller♦
43.9k1161141
asked Feb 28 at 2:04
I.T. G.I.T. G.
31
edited Feb 28 at 2:08
Jeff Schaller♦
43.9k1161141
asked Feb 28 at 2:04
I.T. G.I.T. G.
31
edited Feb 28 at 2:08
Jeff Schaller♦
43.9k1161141
edited Feb 28 at 2:08
Jeff Schaller♦
43.9k1161141
edited Feb 28 at 2:08
Jeff Schaller♦
43.9k1161141
43.9k1161141
asked Feb 28 at 2:04
I.T. G.I.T. G.
31
asked Feb 28 at 2:04
I.T. G.I.T. G.
31
asked Feb 28 at 2:04
I.T. G.I.T. G.
31
31
add a comment |
add a comment |
1 Answer
1
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 Feb 28 at 2:10
Jeff Schaller♦Jeff Schaller
43.9k1161141
Thank you! This worked.
– I.T. G.
Feb 28 at 2:31
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
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 Feb 28 at 2:10
Jeff Schaller♦Jeff Schaller
43.9k1161141
Thank you! This worked.
– I.T. G.
Feb 28 at 2:31
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 Feb 28 at 2:10
Jeff Schaller♦Jeff Schaller
43.9k1161141
Thank you! This worked.
– I.T. G.
Feb 28 at 2:31
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 Feb 28 at 2:10
Jeff Schaller♦Jeff Schaller
43.9k1161141
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 Feb 28 at 2:10
Jeff Schaller♦Jeff Schaller
43.9k1161141
answered Feb 28 at 2:10
Jeff Schaller♦Jeff Schaller
43.9k1161141
answered Feb 28 at 2:10
Jeff Schaller♦Jeff Schaller
43.9k1161141
answered Feb 28 at 2:10
Jeff Schaller♦Jeff Schaller
43.9k1161141
43.9k1161141
Thank you! This worked.
– I.T. G.
Feb 28 at 2:31
add a comment |
Thank you! This worked.
– I.T. G.
Feb 28 at 2:31
Thank you! This worked.
– I.T. G.
Feb 28 at 2:31
Thank you! This worked.
– I.T. G.
Feb 28 at 2:31
add a comment |
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