sed search and show matching pattern, removing the rest
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I am trying to clean a list containing packages. I wish to remove the package revisions, leaving the package names only.
I see every package has naming convention like this: package-name-majorver-minorver , etc: openssl-1.0.1e-57.0.5.el6 . I want openssl only, not -1.0.1e-57.0.5.el6
So far I have this sed 's/^.*-//', but this doesn't work obviously.
sed package-management rpm
asked Mar 13 at 9:49
user121392user121392
85
add a comment |
I am trying to clean a list containing packages. I wish to remove the package revisions, leaving the package names only.
I see every package has naming convention like this: package-name-majorver-minorver , etc: openssl-1.0.1e-57.0.5.el6 . I want openssl only, not -1.0.1e-57.0.5.el6
So far I have this sed 's/^.*-//', but this doesn't work obviously.
sed package-management rpm
asked Mar 13 at 9:49
user121392user121392
85
watch out for package names with dashes! If you're gathering the list with RPM, consider using the --queryformat to get the %NAME separately.
– Jeff Schaller♦
Mar 13 at 11:05
add a comment |
I am trying to clean a list containing packages. I wish to remove the package revisions, leaving the package names only.
I see every package has naming convention like this: package-name-majorver-minorver , etc: openssl-1.0.1e-57.0.5.el6 . I want openssl only, not -1.0.1e-57.0.5.el6
So far I have this sed 's/^.*-//', but this doesn't work obviously.
sed package-management rpm
asked Mar 13 at 9:49
user121392user121392
85
I am trying to clean a list containing packages. I wish to remove the package revisions, leaving the package names only.
I see every package has naming convention like this: package-name-majorver-minorver , etc: openssl-1.0.1e-57.0.5.el6 . I want openssl only, not -1.0.1e-57.0.5.el6
So far I have this sed 's/^.*-//', but this doesn't work obviously.
sed package-management rpm
sed package-management rpm
asked Mar 13 at 9:49
user121392user121392
85
asked Mar 13 at 9:49
user121392user121392
85
asked Mar 13 at 9:49
user121392user121392
85
asked Mar 13 at 9:49
user121392user121392
85
asked Mar 13 at 9:49
user121392user121392
85
85
watch out for package names with dashes! If you're gathering the list with RPM, consider using the --queryformat to get the %NAME separately.
– Jeff Schaller♦
Mar 13 at 11:05
add a comment |
watch out for package names with dashes! If you're gathering the list with RPM, consider using the --queryformat to get the %NAME separately.
– Jeff Schaller♦
Mar 13 at 11:05
watch out for package names with dashes! If you're gathering the list with RPM, consider using the --queryformat to get the %NAME separately.
– Jeff Schaller♦
Mar 13 at 11:05
watch out for package names with dashes! If you're gathering the list with RPM, consider using the --queryformat to get the %NAME separately.
– Jeff Schaller♦
Mar 13 at 11:05
add a comment |
3 Answers
3
active
oldest
votes
If the package name always has two version number parts appended, separated by hyphens, and if the version parts never contain a hyphen, you can use this command
sed 's/-[^-]*-[^-]*$//'
This will remove two hyphens, each followed by 0 or more non-hyphen characters, at the end of the line ($). It would also change e.g. foo-bar-baz-- to foo-bar-baz.
answered Mar 13 at 10:45
BodoBodo
2,271618
add a comment |
If the package name doesn't contain -, this should work:
sed -r 's/([^-]+).*/1/'
answered Mar 13 at 10:06
CharlesCharles
335110
unfortunately, it does, and the number of - 's are inconsistent too, eg: tmux and python-pip, the only consistent ones are major ver and minor ver appended to back separated by -
– user121392
Mar 13 at 10:10
add a comment |
Well I know it's not the best solution, but I found this https://stackoverflow.com/a/51153277/5227747, so the solution was
cat file | sed 's/ // ; s/-/t/' | rev | cut -f 3- | rev | sed 's/t/-/'
it removes the last two '-'-separated columns without fuss, if anyone knows how to do it better I would love to know.
answered Mar 13 at 10:33
user121392user121392
85
Unneccessarycat
– Weijun Zhou
Mar 13 at 10:57
I have to read from a file. I will check sed to improve the command
– user121392
Mar 13 at 11:49
You should almost always dosed ... fileinstead ofcat file | sed ...
– Weijun Zhou
Mar 13 at 22:19
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
If the package name always has two version number parts appended, separated by hyphens, and if the version parts never contain a hyphen, you can use this command
sed 's/-[^-]*-[^-]*$//'
This will remove two hyphens, each followed by 0 or more non-hyphen characters, at the end of the line ($). It would also change e.g. foo-bar-baz-- to foo-bar-baz.
answered Mar 13 at 10:45
BodoBodo
2,271618
add a comment |
If the package name always has two version number parts appended, separated by hyphens, and if the version parts never contain a hyphen, you can use this command
sed 's/-[^-]*-[^-]*$//'
This will remove two hyphens, each followed by 0 or more non-hyphen characters, at the end of the line ($). It would also change e.g. foo-bar-baz-- to foo-bar-baz.
answered Mar 13 at 10:45
BodoBodo
2,271618
add a comment |
If the package name always has two version number parts appended, separated by hyphens, and if the version parts never contain a hyphen, you can use this command
sed 's/-[^-]*-[^-]*$//'
This will remove two hyphens, each followed by 0 or more non-hyphen characters, at the end of the line ($). It would also change e.g. foo-bar-baz-- to foo-bar-baz.
answered Mar 13 at 10:45
BodoBodo
2,271618
If the package name always has two version number parts appended, separated by hyphens, and if the version parts never contain a hyphen, you can use this command
sed 's/-[^-]*-[^-]*$//'
This will remove two hyphens, each followed by 0 or more non-hyphen characters, at the end of the line ($). It would also change e.g. foo-bar-baz-- to foo-bar-baz.
answered Mar 13 at 10:45
BodoBodo
2,271618
answered Mar 13 at 10:45
BodoBodo
2,271618
answered Mar 13 at 10:45
BodoBodo
2,271618
answered Mar 13 at 10:45
BodoBodo
2,271618
2,271618
add a comment |
add a comment |
If the package name doesn't contain -, this should work:
sed -r 's/([^-]+).*/1/'
answered Mar 13 at 10:06
CharlesCharles
335110
unfortunately, it does, and the number of - 's are inconsistent too, eg: tmux and python-pip, the only consistent ones are major ver and minor ver appended to back separated by -
– user121392
Mar 13 at 10:10
add a comment |
If the package name doesn't contain -, this should work:
sed -r 's/([^-]+).*/1/'
answered Mar 13 at 10:06
CharlesCharles
335110
unfortunately, it does, and the number of - 's are inconsistent too, eg: tmux and python-pip, the only consistent ones are major ver and minor ver appended to back separated by -
– user121392
Mar 13 at 10:10
add a comment |
If the package name doesn't contain -, this should work:
sed -r 's/([^-]+).*/1/'
answered Mar 13 at 10:06
CharlesCharles
335110
If the package name doesn't contain -, this should work:
sed -r 's/([^-]+).*/1/'
answered Mar 13 at 10:06
CharlesCharles
335110
answered Mar 13 at 10:06
CharlesCharles
335110
answered Mar 13 at 10:06
CharlesCharles
335110
answered Mar 13 at 10:06
CharlesCharles
335110
335110
unfortunately, it does, and the number of - 's are inconsistent too, eg: tmux and python-pip, the only consistent ones are major ver and minor ver appended to back separated by -
– user121392
Mar 13 at 10:10
add a comment |
unfortunately, it does, and the number of - 's are inconsistent too, eg: tmux and python-pip, the only consistent ones are major ver and minor ver appended to back separated by -
– user121392
Mar 13 at 10:10
unfortunately, it does, and the number of - 's are inconsistent too, eg: tmux and python-pip, the only consistent ones are major ver and minor ver appended to back separated by -
– user121392
Mar 13 at 10:10
unfortunately, it does, and the number of - 's are inconsistent too, eg: tmux and python-pip, the only consistent ones are major ver and minor ver appended to back separated by -
– user121392
Mar 13 at 10:10
add a comment |
Well I know it's not the best solution, but I found this https://stackoverflow.com/a/51153277/5227747, so the solution was
cat file | sed 's/ // ; s/-/t/' | rev | cut -f 3- | rev | sed 's/t/-/'
it removes the last two '-'-separated columns without fuss, if anyone knows how to do it better I would love to know.
answered Mar 13 at 10:33
user121392user121392
85
Unneccessarycat
– Weijun Zhou
Mar 13 at 10:57
I have to read from a file. I will check sed to improve the command
– user121392
Mar 13 at 11:49
You should almost always dosed ... fileinstead ofcat file | sed ...
– Weijun Zhou
Mar 13 at 22:19
add a comment |
Well I know it's not the best solution, but I found this https://stackoverflow.com/a/51153277/5227747, so the solution was
cat file | sed 's/ // ; s/-/t/' | rev | cut -f 3- | rev | sed 's/t/-/'
it removes the last two '-'-separated columns without fuss, if anyone knows how to do it better I would love to know.
answered Mar 13 at 10:33
user121392user121392
85
Unneccessarycat
– Weijun Zhou
Mar 13 at 10:57
I have to read from a file. I will check sed to improve the command
– user121392
Mar 13 at 11:49
You should almost always dosed ... fileinstead ofcat file | sed ...
– Weijun Zhou
Mar 13 at 22:19
add a comment |
Well I know it's not the best solution, but I found this https://stackoverflow.com/a/51153277/5227747, so the solution was
cat file | sed 's/ // ; s/-/t/' | rev | cut -f 3- | rev | sed 's/t/-/'
it removes the last two '-'-separated columns without fuss, if anyone knows how to do it better I would love to know.
answered Mar 13 at 10:33
user121392user121392
85
Well I know it's not the best solution, but I found this https://stackoverflow.com/a/51153277/5227747, so the solution was
cat file | sed 's/ // ; s/-/t/' | rev | cut -f 3- | rev | sed 's/t/-/'
it removes the last two '-'-separated columns without fuss, if anyone knows how to do it better I would love to know.
answered Mar 13 at 10:33
user121392user121392
85
answered Mar 13 at 10:33
user121392user121392
85
answered Mar 13 at 10:33
user121392user121392
85
answered Mar 13 at 10:33
user121392user121392
85
85
Unneccessarycat
– Weijun Zhou
Mar 13 at 10:57
I have to read from a file. I will check sed to improve the command
– user121392
Mar 13 at 11:49
You should almost always dosed ... fileinstead ofcat file | sed ...
– Weijun Zhou
Mar 13 at 22:19
add a comment |
Unneccessarycat
– Weijun Zhou
Mar 13 at 10:57
I have to read from a file. I will check sed to improve the command
– user121392
Mar 13 at 11:49
You should almost always dosed ... fileinstead ofcat file | sed ...
– Weijun Zhou
Mar 13 at 22:19
Unneccessary
cat– Weijun Zhou
Mar 13 at 10:57
Unneccessary
cat– Weijun Zhou
Mar 13 at 10:57
I have to read from a file. I will check sed to improve the command
– user121392
Mar 13 at 11:49
I have to read from a file. I will check sed to improve the command
– user121392
Mar 13 at 11:49
You should almost always do
sed ... file instead of cat file | sed ...– Weijun Zhou
Mar 13 at 22:19
You should almost always do
sed ... file instead of cat file | sed ...– Weijun Zhou
Mar 13 at 22:19
add a comment |
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watch out for package names with dashes! If you're gathering the list with RPM, consider using the --queryformat to get the %NAME separately.
– Jeff Schaller♦
Mar 13 at 11:05