replace a string with sed from specific lines
I do know how to replace a string from a specific line such as:
sed -i "<line number>s/<old string>/<new string>/g" <file name>
however I do not know how to replace a string from multiple lines for example from a line number 1 then 10 and then 100
sed
edited Dec 8 at 20:39
Jeff Schaller
38.7k1053125
asked Dec 8 at 20:37
Dimitris Mintis
755
add a comment |
I do know how to replace a string from a specific line such as:
sed -i "<line number>s/<old string>/<new string>/g" <file name>
however I do not know how to replace a string from multiple lines for example from a line number 1 then 10 and then 100
sed
edited Dec 8 at 20:39
Jeff Schaller
38.7k1053125
asked Dec 8 at 20:37
Dimitris Mintis
755
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 at 21:33
add a comment |
I do know how to replace a string from a specific line such as:
sed -i "<line number>s/<old string>/<new string>/g" <file name>
however I do not know how to replace a string from multiple lines for example from a line number 1 then 10 and then 100
sed
edited Dec 8 at 20:39
Jeff Schaller
38.7k1053125
asked Dec 8 at 20:37
Dimitris Mintis
755
I do know how to replace a string from a specific line such as:
sed -i "<line number>s/<old string>/<new string>/g" <file name>
however I do not know how to replace a string from multiple lines for example from a line number 1 then 10 and then 100
sed
sed
edited Dec 8 at 20:39
Jeff Schaller
38.7k1053125
asked Dec 8 at 20:37
Dimitris Mintis
755
edited Dec 8 at 20:39
Jeff Schaller
38.7k1053125
asked Dec 8 at 20:37
Dimitris Mintis
755
edited Dec 8 at 20:39
Jeff Schaller
38.7k1053125
edited Dec 8 at 20:39
Jeff Schaller
38.7k1053125
edited Dec 8 at 20:39
Jeff Schaller
38.7k1053125
38.7k1053125
asked Dec 8 at 20:37
Dimitris Mintis
755
asked Dec 8 at 20:37
Dimitris Mintis
755
asked Dec 8 at 20:37
Dimitris Mintis
755
755
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 at 21:33
add a comment |
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 at 21:33
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 at 21:33
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 at 21:33
add a comment |
4 Answers
4
active
oldest
votes
Here is an awk answer.
awk 'NR == 1 || NR == 10 || NR == 100 {gsub(/old/,"new")}; {print}' <file name>
Explanation
NR == 1 || NR == 10 || NR == 100: only do the following commands on one of these lines.
gsub(/old/,"new"): substitute/old/withnew.
{print}: regardless of what line you are on, print the line.
answered Dec 8 at 22:06
Sparhawk
9,27363991
add a comment |
As far as I know, sed addresses may only consist of a single line, or a range of lines.
However you could cobble something together using sed -f - to read commands from standard input, together with your shell. For example:
printf '%ds/<old string>/<new string>/gn' {1,10,100} | sed -f - file
answered Dec 8 at 23:16
steeldriver
34.3k35083
Brilliant solution. Alternative to avoid the pipe:sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1
– George Vasiliou
Dec 9 at 17:36
add a comment |
An alternative directly with sed:
sed '1b1; 10b1; 100b1; b ;:1;s/<old string>/<new string>/g' <file name>
If the line number matches either 1, 10, or 100, branch to label 1; on other lines, just branch to the end (which, by default, prints the line).
somewhat automated:
sed -e $(printf '%sb1;' 1 10 100) -e 'b; :1;s/<old>/<new>/g' <file name>
POSIXly (with default IFS):
sed $(printf -- '-e %sb1 ' 1 10 100) -e 'b' -e':1' -e 's/<old>/<new>/g'
edited Dec 9 at 1:05
Jeff Schaller
38.7k1053125
answered Dec 9 at 0:30
Isaac
11.2k11648
add a comment |
Well, how about:
sed -e '
/something_identifying_startline/,/something_identifying_endline/{
s/dog/cat/
s/black/white/
}
answered Dec 8 at 22:00
Don W
1
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 at 22:03
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
Here is an awk answer.
awk 'NR == 1 || NR == 10 || NR == 100 {gsub(/old/,"new")}; {print}' <file name>
Explanation
NR == 1 || NR == 10 || NR == 100: only do the following commands on one of these lines.
gsub(/old/,"new"): substitute/old/withnew.
{print}: regardless of what line you are on, print the line.
answered Dec 8 at 22:06
Sparhawk
9,27363991
add a comment |
Here is an awk answer.
awk 'NR == 1 || NR == 10 || NR == 100 {gsub(/old/,"new")}; {print}' <file name>
Explanation
NR == 1 || NR == 10 || NR == 100: only do the following commands on one of these lines.
gsub(/old/,"new"): substitute/old/withnew.
{print}: regardless of what line you are on, print the line.
answered Dec 8 at 22:06
Sparhawk
9,27363991
add a comment |
Here is an awk answer.
awk 'NR == 1 || NR == 10 || NR == 100 {gsub(/old/,"new")}; {print}' <file name>
Explanation
NR == 1 || NR == 10 || NR == 100: only do the following commands on one of these lines.
gsub(/old/,"new"): substitute/old/withnew.
{print}: regardless of what line you are on, print the line.
answered Dec 8 at 22:06
Sparhawk
9,27363991
Here is an awk answer.
awk 'NR == 1 || NR == 10 || NR == 100 {gsub(/old/,"new")}; {print}' <file name>
Explanation
NR == 1 || NR == 10 || NR == 100: only do the following commands on one of these lines.
gsub(/old/,"new"): substitute/old/withnew.
{print}: regardless of what line you are on, print the line.
answered Dec 8 at 22:06
Sparhawk
9,27363991
answered Dec 8 at 22:06
Sparhawk
9,27363991
answered Dec 8 at 22:06
Sparhawk
9,27363991
answered Dec 8 at 22:06
Sparhawk
9,27363991
9,27363991
add a comment |
add a comment |
As far as I know, sed addresses may only consist of a single line, or a range of lines.
However you could cobble something together using sed -f - to read commands from standard input, together with your shell. For example:
printf '%ds/<old string>/<new string>/gn' {1,10,100} | sed -f - file
answered Dec 8 at 23:16
steeldriver
34.3k35083
Brilliant solution. Alternative to avoid the pipe:sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1
– George Vasiliou
Dec 9 at 17:36
add a comment |
As far as I know, sed addresses may only consist of a single line, or a range of lines.
However you could cobble something together using sed -f - to read commands from standard input, together with your shell. For example:
printf '%ds/<old string>/<new string>/gn' {1,10,100} | sed -f - file
answered Dec 8 at 23:16
steeldriver
34.3k35083
Brilliant solution. Alternative to avoid the pipe:sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1
– George Vasiliou
Dec 9 at 17:36
add a comment |
As far as I know, sed addresses may only consist of a single line, or a range of lines.
However you could cobble something together using sed -f - to read commands from standard input, together with your shell. For example:
printf '%ds/<old string>/<new string>/gn' {1,10,100} | sed -f - file
answered Dec 8 at 23:16
steeldriver
34.3k35083
As far as I know, sed addresses may only consist of a single line, or a range of lines.
However you could cobble something together using sed -f - to read commands from standard input, together with your shell. For example:
printf '%ds/<old string>/<new string>/gn' {1,10,100} | sed -f - file
answered Dec 8 at 23:16
steeldriver
34.3k35083
answered Dec 8 at 23:16
steeldriver
34.3k35083
answered Dec 8 at 23:16
steeldriver
34.3k35083
answered Dec 8 at 23:16
steeldriver
34.3k35083
34.3k35083
Brilliant solution. Alternative to avoid the pipe:sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1
– George Vasiliou
Dec 9 at 17:36
add a comment |
Brilliant solution. Alternative to avoid the pipe:sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1
– George Vasiliou
Dec 9 at 17:36
Brilliant solution. Alternative to avoid the pipe:
sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1– George Vasiliou
Dec 9 at 17:36
Brilliant solution. Alternative to avoid the pipe:
sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1– George Vasiliou
Dec 9 at 17:36
add a comment |
An alternative directly with sed:
sed '1b1; 10b1; 100b1; b ;:1;s/<old string>/<new string>/g' <file name>
If the line number matches either 1, 10, or 100, branch to label 1; on other lines, just branch to the end (which, by default, prints the line).
somewhat automated:
sed -e $(printf '%sb1;' 1 10 100) -e 'b; :1;s/<old>/<new>/g' <file name>
POSIXly (with default IFS):
sed $(printf -- '-e %sb1 ' 1 10 100) -e 'b' -e':1' -e 's/<old>/<new>/g'
edited Dec 9 at 1:05
Jeff Schaller
38.7k1053125
answered Dec 9 at 0:30
Isaac
11.2k11648
add a comment |
An alternative directly with sed:
sed '1b1; 10b1; 100b1; b ;:1;s/<old string>/<new string>/g' <file name>
If the line number matches either 1, 10, or 100, branch to label 1; on other lines, just branch to the end (which, by default, prints the line).
somewhat automated:
sed -e $(printf '%sb1;' 1 10 100) -e 'b; :1;s/<old>/<new>/g' <file name>
POSIXly (with default IFS):
sed $(printf -- '-e %sb1 ' 1 10 100) -e 'b' -e':1' -e 's/<old>/<new>/g'
edited Dec 9 at 1:05
Jeff Schaller
38.7k1053125
answered Dec 9 at 0:30
Isaac
11.2k11648
add a comment |
An alternative directly with sed:
sed '1b1; 10b1; 100b1; b ;:1;s/<old string>/<new string>/g' <file name>
If the line number matches either 1, 10, or 100, branch to label 1; on other lines, just branch to the end (which, by default, prints the line).
somewhat automated:
sed -e $(printf '%sb1;' 1 10 100) -e 'b; :1;s/<old>/<new>/g' <file name>
POSIXly (with default IFS):
sed $(printf -- '-e %sb1 ' 1 10 100) -e 'b' -e':1' -e 's/<old>/<new>/g'
edited Dec 9 at 1:05
Jeff Schaller
38.7k1053125
answered Dec 9 at 0:30
Isaac
11.2k11648
An alternative directly with sed:
sed '1b1; 10b1; 100b1; b ;:1;s/<old string>/<new string>/g' <file name>
If the line number matches either 1, 10, or 100, branch to label 1; on other lines, just branch to the end (which, by default, prints the line).
somewhat automated:
sed -e $(printf '%sb1;' 1 10 100) -e 'b; :1;s/<old>/<new>/g' <file name>
POSIXly (with default IFS):
sed $(printf -- '-e %sb1 ' 1 10 100) -e 'b' -e':1' -e 's/<old>/<new>/g'
edited Dec 9 at 1:05
Jeff Schaller
38.7k1053125
answered Dec 9 at 0:30
Isaac
11.2k11648
edited Dec 9 at 1:05
Jeff Schaller
38.7k1053125
edited Dec 9 at 1:05
Jeff Schaller
38.7k1053125
edited Dec 9 at 1:05
Jeff Schaller
38.7k1053125
38.7k1053125
answered Dec 9 at 0:30
Isaac
11.2k11648
answered Dec 9 at 0:30
Isaac
11.2k11648
answered Dec 9 at 0:30
Isaac
11.2k11648
11.2k11648
add a comment |
add a comment |
Well, how about:
sed -e '
/something_identifying_startline/,/something_identifying_endline/{
s/dog/cat/
s/black/white/
}
answered Dec 8 at 22:00
Don W
1
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 at 22:03
add a comment |
Well, how about:
sed -e '
/something_identifying_startline/,/something_identifying_endline/{
s/dog/cat/
s/black/white/
}
answered Dec 8 at 22:00
Don W
1
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 at 22:03
add a comment |
Well, how about:
sed -e '
/something_identifying_startline/,/something_identifying_endline/{
s/dog/cat/
s/black/white/
}
answered Dec 8 at 22:00
Don W
1
Well, how about:
sed -e '
/something_identifying_startline/,/something_identifying_endline/{
s/dog/cat/
s/black/white/
}
answered Dec 8 at 22:00
Don W
1
answered Dec 8 at 22:00
Don W
1
answered Dec 8 at 22:00
Don W
1
answered Dec 8 at 22:00
Don W
1
1
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 at 22:03
add a comment |
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 at 22:03
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 at 22:03
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 at 22:03
add a comment |
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sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 at 21:33