To delete everything between square brackets
Clash Royale CLAN TAG#URR8PPP
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I need to find the line in a lvm.conf file which starts with string, global_filter and remove everything between the square brackets except "r/.*/".
There is only 1 line which starts with global_filter.
Before Removal:
global_filter = [ "a|^/dev/sda.*$|", "a|^/dev/sdb.*$|", "r/.*/"]
After the Removal, it should be -
global_filter = [, "r/.*/"]
linux sed
edited Nov 20 at 22:25
Rui F Ribeiro
38.2k1475125
asked Jul 24 '17 at 11:11
user7290726
348
add a comment |
up vote
0
down vote
favorite
1
I need to find the line in a lvm.conf file which starts with string, global_filter and remove everything between the square brackets except "r/.*/".
There is only 1 line which starts with global_filter.
Before Removal:
global_filter = [ "a|^/dev/sda.*$|", "a|^/dev/sdb.*$|", "r/.*/"]
After the Removal, it should be -
global_filter = [, "r/.*/"]
linux sed
edited Nov 20 at 22:25
Rui F Ribeiro
38.2k1475125
asked Jul 24 '17 at 11:11
user7290726
348
Okay, I suppose you know how to address a line insedand you know thescommand, so the only problem is to define a good regex for your match? How about[.*,? Now build your command or ask a specific question.
– Philippos
Jul 24 '17 at 11:20
Shouldglobal_filterlines that do not contain"r/.*/"be modified?
– Stéphane Chazelas
Jul 24 '17 at 11:27
Are you sure you want to leave the leading comma in?
– Stéphane Chazelas
Jul 24 '17 at 11:28
Yes I want the comma should be retained. And also only that line in the file should be modified.
– user7290726
Jul 24 '17 at 12:43
add a comment |
up vote
0
down vote
favorite
1
up vote
0
down vote
favorite
1
1
I need to find the line in a lvm.conf file which starts with string, global_filter and remove everything between the square brackets except "r/.*/".
There is only 1 line which starts with global_filter.
Before Removal:
global_filter = [ "a|^/dev/sda.*$|", "a|^/dev/sdb.*$|", "r/.*/"]
After the Removal, it should be -
global_filter = [, "r/.*/"]
linux sed
edited Nov 20 at 22:25
Rui F Ribeiro
38.2k1475125
asked Jul 24 '17 at 11:11
user7290726
348
I need to find the line in a lvm.conf file which starts with string, global_filter and remove everything between the square brackets except "r/.*/".
There is only 1 line which starts with global_filter.
Before Removal:
global_filter = [ "a|^/dev/sda.*$|", "a|^/dev/sdb.*$|", "r/.*/"]
After the Removal, it should be -
global_filter = [, "r/.*/"]
linux sed
linux sed
edited Nov 20 at 22:25
Rui F Ribeiro
38.2k1475125
asked Jul 24 '17 at 11:11
user7290726
348
edited Nov 20 at 22:25
Rui F Ribeiro
38.2k1475125
asked Jul 24 '17 at 11:11
user7290726
348
edited Nov 20 at 22:25
Rui F Ribeiro
38.2k1475125
edited Nov 20 at 22:25
Rui F Ribeiro
38.2k1475125
edited Nov 20 at 22:25
Rui F Ribeiro
38.2k1475125
38.2k1475125
asked Jul 24 '17 at 11:11
user7290726
348
asked Jul 24 '17 at 11:11
user7290726
348
asked Jul 24 '17 at 11:11
user7290726
348
348
Okay, I suppose you know how to address a line insedand you know thescommand, so the only problem is to define a good regex for your match? How about[.*,? Now build your command or ask a specific question.
– Philippos
Jul 24 '17 at 11:20
Shouldglobal_filterlines that do not contain"r/.*/"be modified?
– Stéphane Chazelas
Jul 24 '17 at 11:27
Are you sure you want to leave the leading comma in?
– Stéphane Chazelas
Jul 24 '17 at 11:28
Yes I want the comma should be retained. And also only that line in the file should be modified.
– user7290726
Jul 24 '17 at 12:43
add a comment |
Okay, I suppose you know how to address a line insedand you know thescommand, so the only problem is to define a good regex for your match? How about[.*,? Now build your command or ask a specific question.
– Philippos
Jul 24 '17 at 11:20
Shouldglobal_filterlines that do not contain"r/.*/"be modified?
– Stéphane Chazelas
Jul 24 '17 at 11:27
Are you sure you want to leave the leading comma in?
– Stéphane Chazelas
Jul 24 '17 at 11:28
Yes I want the comma should be retained. And also only that line in the file should be modified.
– user7290726
Jul 24 '17 at 12:43
Okay, I suppose you know how to address a line in
sed and you know the s command, so the only problem is to define a good regex for your match? How about [.*,? Now build your command or ask a specific question.– Philippos
Jul 24 '17 at 11:20
Okay, I suppose you know how to address a line in
sed and you know the s command, so the only problem is to define a good regex for your match? How about [.*,? Now build your command or ask a specific question.– Philippos
Jul 24 '17 at 11:20
Should
global_filter lines that do not contain "r/.*/" be modified?– Stéphane Chazelas
Jul 24 '17 at 11:27
Should
global_filter lines that do not contain "r/.*/" be modified?– Stéphane Chazelas
Jul 24 '17 at 11:27
Are you sure you want to leave the leading comma in?
– Stéphane Chazelas
Jul 24 '17 at 11:28
Are you sure you want to leave the leading comma in?
– Stéphane Chazelas
Jul 24 '17 at 11:28
Yes I want the comma should be retained. And also only that line in the file should be modified.
– user7290726
Jul 24 '17 at 12:43
Yes I want the comma should be retained. And also only that line in the file should be modified.
– user7290726
Jul 24 '17 at 12:43
add a comment |
2 Answers
2
active
oldest
votes
up vote
1
down vote
accepted
sed -i -e '/^global_filter/' data
Explanation
sed -i -e '
# look at only lines that begin with global_filter
/^global_filter/"r/.*/"
' data
Thanks for the help. This replaces the entire file. I want only that line to be modified.
– user7290726
Jul 24 '17 at 12:44
I modified the command by replacing the -n flag by -i and it worked. It is working as expected but I am seeing a duplicate entry the next line.
– user7290726
Jul 24 '17 at 12:54
Can you please help me in that.
– user7290726
Jul 24 '17 at 12:55
Yes I tried with the first method itself. It is giving duplicate entry in the file.
– user7290726
Jul 24 '17 at 13:03
With -n option, the entire file is being replaced by just the global_filter line.
– user7290726
Jul 24 '17 at 13:14
add a comment |
up vote
0
down vote
Try this:
$ echo 'global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/.*/"]'|
sed -E 's/(^global_filter = [)(.*)(, "r.*$)/13/'
Output:
global_filter = [, "r/.*/"]
answered Jul 24 '17 at 11:21
John Goofy
556113
Just try on the input:global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/Dot_Star/"]'
– user218374
Jul 24 '17 at 11:24
Sorry John this is not working
– user7290726
Jul 24 '17 at 13:04
I mean for file input, I could not get this working.. can you help me out.
– user7290726
Jul 24 '17 at 13:15
@user7290726 I see. Could you please than post an excerpt of your input file to make it easier to guess what you want?
– John Goofy
Jul 24 '17 at 13:20
The file has only 1 line which starts with global_filter. And I need the changes as said earlier.
– user7290726
Jul 26 '17 at 2:55
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
sed -i -e '/^global_filter/' data
Explanation
sed -i -e '
# look at only lines that begin with global_filter
/^global_filter/"r/.*/"
' data
Thanks for the help. This replaces the entire file. I want only that line to be modified.
– user7290726
Jul 24 '17 at 12:44
I modified the command by replacing the -n flag by -i and it worked. It is working as expected but I am seeing a duplicate entry the next line.
– user7290726
Jul 24 '17 at 12:54
Can you please help me in that.
– user7290726
Jul 24 '17 at 12:55
Yes I tried with the first method itself. It is giving duplicate entry in the file.
– user7290726
Jul 24 '17 at 13:03
With -n option, the entire file is being replaced by just the global_filter line.
– user7290726
Jul 24 '17 at 13:14
add a comment |
up vote
1
down vote
accepted
sed -i -e '/^global_filter/' data
Explanation
sed -i -e '
# look at only lines that begin with global_filter
/^global_filter/"r/.*/"
' data
Thanks for the help. This replaces the entire file. I want only that line to be modified.
– user7290726
Jul 24 '17 at 12:44
I modified the command by replacing the -n flag by -i and it worked. It is working as expected but I am seeing a duplicate entry the next line.
– user7290726
Jul 24 '17 at 12:54
Can you please help me in that.
– user7290726
Jul 24 '17 at 12:55
Yes I tried with the first method itself. It is giving duplicate entry in the file.
– user7290726
Jul 24 '17 at 13:03
With -n option, the entire file is being replaced by just the global_filter line.
– user7290726
Jul 24 '17 at 13:14
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
sed -i -e '/^global_filter/' data
Explanation
sed -i -e '
# look at only lines that begin with global_filter
/^global_filter/"r/.*/"
' data
sed -i -e '/^global_filter/' data
Explanation
sed -i -e '
# look at only lines that begin with global_filter
/^global_filter/"r/.*/"
' data
edited Jul 24 '17 at 13:15
answered Jul 24 '17 at 11:21
user218374
Thanks for the help. This replaces the entire file. I want only that line to be modified.
– user7290726
Jul 24 '17 at 12:44
I modified the command by replacing the -n flag by -i and it worked. It is working as expected but I am seeing a duplicate entry the next line.
– user7290726
Jul 24 '17 at 12:54
Can you please help me in that.
– user7290726
Jul 24 '17 at 12:55
Yes I tried with the first method itself. It is giving duplicate entry in the file.
– user7290726
Jul 24 '17 at 13:03
With -n option, the entire file is being replaced by just the global_filter line.
– user7290726
Jul 24 '17 at 13:14
add a comment |
Thanks for the help. This replaces the entire file. I want only that line to be modified.
– user7290726
Jul 24 '17 at 12:44
I modified the command by replacing the -n flag by -i and it worked. It is working as expected but I am seeing a duplicate entry the next line.
– user7290726
Jul 24 '17 at 12:54
Can you please help me in that.
– user7290726
Jul 24 '17 at 12:55
Yes I tried with the first method itself. It is giving duplicate entry in the file.
– user7290726
Jul 24 '17 at 13:03
With -n option, the entire file is being replaced by just the global_filter line.
– user7290726
Jul 24 '17 at 13:14
Thanks for the help. This replaces the entire file. I want only that line to be modified.
– user7290726
Jul 24 '17 at 12:44
Thanks for the help. This replaces the entire file. I want only that line to be modified.
– user7290726
Jul 24 '17 at 12:44
I modified the command by replacing the -n flag by -i and it worked. It is working as expected but I am seeing a duplicate entry the next line.
– user7290726
Jul 24 '17 at 12:54
I modified the command by replacing the -n flag by -i and it worked. It is working as expected but I am seeing a duplicate entry the next line.
– user7290726
Jul 24 '17 at 12:54
Can you please help me in that.
– user7290726
Jul 24 '17 at 12:55
Can you please help me in that.
– user7290726
Jul 24 '17 at 12:55
Yes I tried with the first method itself. It is giving duplicate entry in the file.
– user7290726
Jul 24 '17 at 13:03
Yes I tried with the first method itself. It is giving duplicate entry in the file.
– user7290726
Jul 24 '17 at 13:03
With -n option, the entire file is being replaced by just the global_filter line.
– user7290726
Jul 24 '17 at 13:14
With -n option, the entire file is being replaced by just the global_filter line.
– user7290726
Jul 24 '17 at 13:14
add a comment |
up vote
0
down vote
Try this:
$ echo 'global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/.*/"]'|
sed -E 's/(^global_filter = [)(.*)(, "r.*$)/13/'
Output:
global_filter = [, "r/.*/"]
answered Jul 24 '17 at 11:21
John Goofy
556113
Just try on the input:global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/Dot_Star/"]'
– user218374
Jul 24 '17 at 11:24
Sorry John this is not working
– user7290726
Jul 24 '17 at 13:04
I mean for file input, I could not get this working.. can you help me out.
– user7290726
Jul 24 '17 at 13:15
@user7290726 I see. Could you please than post an excerpt of your input file to make it easier to guess what you want?
– John Goofy
Jul 24 '17 at 13:20
The file has only 1 line which starts with global_filter. And I need the changes as said earlier.
– user7290726
Jul 26 '17 at 2:55
add a comment |
up vote
0
down vote
Try this:
$ echo 'global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/.*/"]'|
sed -E 's/(^global_filter = [)(.*)(, "r.*$)/13/'
Output:
global_filter = [, "r/.*/"]
answered Jul 24 '17 at 11:21
John Goofy
556113
Just try on the input:global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/Dot_Star/"]'
– user218374
Jul 24 '17 at 11:24
Sorry John this is not working
– user7290726
Jul 24 '17 at 13:04
I mean for file input, I could not get this working.. can you help me out.
– user7290726
Jul 24 '17 at 13:15
@user7290726 I see. Could you please than post an excerpt of your input file to make it easier to guess what you want?
– John Goofy
Jul 24 '17 at 13:20
The file has only 1 line which starts with global_filter. And I need the changes as said earlier.
– user7290726
Jul 26 '17 at 2:55
add a comment |
up vote
0
down vote
up vote
0
down vote
Try this:
$ echo 'global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/.*/"]'|
sed -E 's/(^global_filter = [)(.*)(, "r.*$)/13/'
Output:
global_filter = [, "r/.*/"]
answered Jul 24 '17 at 11:21
John Goofy
556113
Try this:
$ echo 'global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/.*/"]'|
sed -E 's/(^global_filter = [)(.*)(, "r.*$)/13/'
Output:
global_filter = [, "r/.*/"]
answered Jul 24 '17 at 11:21
John Goofy
556113
edited Jul 24 '17 at 11:50
answered Jul 24 '17 at 11:21
John Goofy
556113
answered Jul 24 '17 at 11:21
John Goofy
556113
answered Jul 24 '17 at 11:21
John Goofy
556113
556113
Just try on the input:global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/Dot_Star/"]'
– user218374
Jul 24 '17 at 11:24
Sorry John this is not working
– user7290726
Jul 24 '17 at 13:04
I mean for file input, I could not get this working.. can you help me out.
– user7290726
Jul 24 '17 at 13:15
@user7290726 I see. Could you please than post an excerpt of your input file to make it easier to guess what you want?
– John Goofy
Jul 24 '17 at 13:20
The file has only 1 line which starts with global_filter. And I need the changes as said earlier.
– user7290726
Jul 26 '17 at 2:55
add a comment |
Just try on the input:global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/Dot_Star/"]'
– user218374
Jul 24 '17 at 11:24
Sorry John this is not working
– user7290726
Jul 24 '17 at 13:04
I mean for file input, I could not get this working.. can you help me out.
– user7290726
Jul 24 '17 at 13:15
@user7290726 I see. Could you please than post an excerpt of your input file to make it easier to guess what you want?
– John Goofy
Jul 24 '17 at 13:20
The file has only 1 line which starts with global_filter. And I need the changes as said earlier.
– user7290726
Jul 26 '17 at 2:55
Just try on the input:
global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/Dot_Star/"]'– user218374
Jul 24 '17 at 11:24
Just try on the input:
global_filter = [ "a|^/dev/sda.$|", "a|^/dev/sdb.$|", "r/Dot_Star/"]'– user218374
Jul 24 '17 at 11:24
Sorry John this is not working
– user7290726
Jul 24 '17 at 13:04
Sorry John this is not working
– user7290726
Jul 24 '17 at 13:04
I mean for file input, I could not get this working.. can you help me out.
– user7290726
Jul 24 '17 at 13:15
I mean for file input, I could not get this working.. can you help me out.
– user7290726
Jul 24 '17 at 13:15
@user7290726 I see. Could you please than post an excerpt of your input file to make it easier to guess what you want?
– John Goofy
Jul 24 '17 at 13:20
@user7290726 I see. Could you please than post an excerpt of your input file to make it easier to guess what you want?
– John Goofy
Jul 24 '17 at 13:20
The file has only 1 line which starts with global_filter. And I need the changes as said earlier.
– user7290726
Jul 26 '17 at 2:55
The file has only 1 line which starts with global_filter. And I need the changes as said earlier.
– user7290726
Jul 26 '17 at 2:55
add a comment |
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Okay, I suppose you know how to address a line in
sedand you know thescommand, so the only problem is to define a good regex for your match? How about[.*,? Now build your command or ask a specific question.– Philippos
Jul 24 '17 at 11:20
Should
global_filterlines that do not contain"r/.*/"be modified?– Stéphane Chazelas
Jul 24 '17 at 11:27
Are you sure you want to leave the leading comma in?
– Stéphane Chazelas
Jul 24 '17 at 11:28
Yes I want the comma should be retained. And also only that line in the file should be modified.
– user7290726
Jul 24 '17 at 12:43