How to search and replace with sed in a line with variable content in it?
I tried to use sed to edit some part of a specific line in a text file and save the change to the original file. OK I now understand that this is not the way sed directly works.
But how can I use sed in a script to edit the part of a line with variable content in it?
I already used sed to change complete lines or used lines as trigger to cut and insert to a new file. But this is different :)
I think what I need is
sed '/baz/s/foo/bar/g'
sed '/beginning of line/s/static text/new static text/g'
This gives me the right output but how can I save it to the source file?
I understand that sed outputs to stoud but when I add a ">> outpufile" it gives me an error message
sed: -e Ausdruck #1, Zeichen 55: Unbekannte Option für `s'
Between static text and new static text is some content that changes from time to time so
sed -n '/static text/new static text/,$p' tmp >> source
will work only for as long as the source content hasn't changed.
Any suggestions?
Greetz
shell-script sed
asked 2 hours ago
diggidrediggidre
384
add a comment |
I tried to use sed to edit some part of a specific line in a text file and save the change to the original file. OK I now understand that this is not the way sed directly works.
But how can I use sed in a script to edit the part of a line with variable content in it?
I already used sed to change complete lines or used lines as trigger to cut and insert to a new file. But this is different :)
I think what I need is
sed '/baz/s/foo/bar/g'
sed '/beginning of line/s/static text/new static text/g'
This gives me the right output but how can I save it to the source file?
I understand that sed outputs to stoud but when I add a ">> outpufile" it gives me an error message
sed: -e Ausdruck #1, Zeichen 55: Unbekannte Option für `s'
Between static text and new static text is some content that changes from time to time so
sed -n '/static text/new static text/,$p' tmp >> source
will work only for as long as the source content hasn't changed.
Any suggestions?
Greetz
shell-script sed
asked 2 hours ago
diggidrediggidre
384
add a comment |
I tried to use sed to edit some part of a specific line in a text file and save the change to the original file. OK I now understand that this is not the way sed directly works.
But how can I use sed in a script to edit the part of a line with variable content in it?
I already used sed to change complete lines or used lines as trigger to cut and insert to a new file. But this is different :)
I think what I need is
sed '/baz/s/foo/bar/g'
sed '/beginning of line/s/static text/new static text/g'
This gives me the right output but how can I save it to the source file?
I understand that sed outputs to stoud but when I add a ">> outpufile" it gives me an error message
sed: -e Ausdruck #1, Zeichen 55: Unbekannte Option für `s'
Between static text and new static text is some content that changes from time to time so
sed -n '/static text/new static text/,$p' tmp >> source
will work only for as long as the source content hasn't changed.
Any suggestions?
Greetz
shell-script sed
asked 2 hours ago
diggidrediggidre
384
I tried to use sed to edit some part of a specific line in a text file and save the change to the original file. OK I now understand that this is not the way sed directly works.
But how can I use sed in a script to edit the part of a line with variable content in it?
I already used sed to change complete lines or used lines as trigger to cut and insert to a new file. But this is different :)
I think what I need is
sed '/baz/s/foo/bar/g'
sed '/beginning of line/s/static text/new static text/g'
This gives me the right output but how can I save it to the source file?
I understand that sed outputs to stoud but when I add a ">> outpufile" it gives me an error message
sed: -e Ausdruck #1, Zeichen 55: Unbekannte Option für `s'
Between static text and new static text is some content that changes from time to time so
sed -n '/static text/new static text/,$p' tmp >> source
will work only for as long as the source content hasn't changed.
Any suggestions?
Greetz
shell-script sed
shell-script sed
asked 2 hours ago
diggidrediggidre
384
asked 2 hours ago
diggidrediggidre
384
asked 2 hours ago
diggidrediggidre
384
asked 2 hours ago
diggidrediggidre
384
asked 2 hours ago
diggidrediggidre
384
384
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
micha@linux-micha: /tmp
$ echo 'alpha bravo charlie' > blah.txt
micha@linux-micha: /tmp
$ cat blah.txt
alpha bravo charlie
micha@linux-micha: /tmp
$ sed -i 's/bravo/delta/' blah.txt
micha@linux-micha: /tmp
$ cat blah.txt
alpha delta charlie
answered 2 hours ago
MichaMicha
893
OK it's a bit late here... I'm confused ^^ Can you explain further please
– diggidre
2 hours ago
Hi, thought you meant in-place editing a file using sed. That's possible with the-ior--in_placeflag. See it in my 3rd command above? Regards.
– Micha
1 hour ago
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
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oldest
votes
micha@linux-micha: /tmp
$ echo 'alpha bravo charlie' > blah.txt
micha@linux-micha: /tmp
$ cat blah.txt
alpha bravo charlie
micha@linux-micha: /tmp
$ sed -i 's/bravo/delta/' blah.txt
micha@linux-micha: /tmp
$ cat blah.txt
alpha delta charlie
answered 2 hours ago
MichaMicha
893
OK it's a bit late here... I'm confused ^^ Can you explain further please
– diggidre
2 hours ago
Hi, thought you meant in-place editing a file using sed. That's possible with the-ior--in_placeflag. See it in my 3rd command above? Regards.
– Micha
1 hour ago
add a comment |
micha@linux-micha: /tmp
$ echo 'alpha bravo charlie' > blah.txt
micha@linux-micha: /tmp
$ cat blah.txt
alpha bravo charlie
micha@linux-micha: /tmp
$ sed -i 's/bravo/delta/' blah.txt
micha@linux-micha: /tmp
$ cat blah.txt
alpha delta charlie
answered 2 hours ago
MichaMicha
893
OK it's a bit late here... I'm confused ^^ Can you explain further please
– diggidre
2 hours ago
Hi, thought you meant in-place editing a file using sed. That's possible with the-ior--in_placeflag. See it in my 3rd command above? Regards.
– Micha
1 hour ago
add a comment |
micha@linux-micha: /tmp
$ echo 'alpha bravo charlie' > blah.txt
micha@linux-micha: /tmp
$ cat blah.txt
alpha bravo charlie
micha@linux-micha: /tmp
$ sed -i 's/bravo/delta/' blah.txt
micha@linux-micha: /tmp
$ cat blah.txt
alpha delta charlie
answered 2 hours ago
MichaMicha
893
micha@linux-micha: /tmp
$ echo 'alpha bravo charlie' > blah.txt
micha@linux-micha: /tmp
$ cat blah.txt
alpha bravo charlie
micha@linux-micha: /tmp
$ sed -i 's/bravo/delta/' blah.txt
micha@linux-micha: /tmp
$ cat blah.txt
alpha delta charlie
answered 2 hours ago
MichaMicha
893
answered 2 hours ago
MichaMicha
893
answered 2 hours ago
MichaMicha
893
answered 2 hours ago
MichaMicha
893
893
OK it's a bit late here... I'm confused ^^ Can you explain further please
– diggidre
2 hours ago
Hi, thought you meant in-place editing a file using sed. That's possible with the-ior--in_placeflag. See it in my 3rd command above? Regards.
– Micha
1 hour ago
add a comment |
OK it's a bit late here... I'm confused ^^ Can you explain further please
– diggidre
2 hours ago
Hi, thought you meant in-place editing a file using sed. That's possible with the-ior--in_placeflag. See it in my 3rd command above? Regards.
– Micha
1 hour ago
OK it's a bit late here... I'm confused ^^ Can you explain further please
– diggidre
2 hours ago
OK it's a bit late here... I'm confused ^^ Can you explain further please
– diggidre
2 hours ago
Hi, thought you meant in-place editing a file using sed. That's possible with the
-i or --in_place flag. See it in my 3rd command above? Regards.– Micha
1 hour ago
Hi, thought you meant in-place editing a file using sed. That's possible with the
-i or --in_place flag. See it in my 3rd command above? Regards.– Micha
1 hour ago
add a comment |
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