All Questions
418
questions
-1
votes
3
answers
90
views
Delete 2-line paragraphs, keep 3-line paragraphs, maintain newline between all
On a Linux machine with GNU tools I have an ascii file that consists of only 2-line and 3-line paragraphs, each paragraph separated by a newline. All 2-line paragraphs are to be deleted so that all 3-...
16
votes
5
answers
1k
views
How can UserA programmatically replace a text string within a file they own that's located in /etc?
A non-root linux user owns a text file that's located in /etc, where the non-root linux user does not have permission to create files. The non-root linux user can edit the file manually via vi without ...
- 163
1
vote
3
answers
73
views
Bash: sum a number present in N lines before a given pattern
I have a kdenlive project file (which is basically a xml file) with a lot of text clips inside. I need to bulk edit the x coordinate of a certain text that appears multiple times. This is an example:
...
- 27
3
votes
7
answers
434
views
How can I print the longest sequence of lines featuring numbers smaller than a threshold?
I am learning Perl, but I don't know how to solve this problem.
I have a .txt file of the following form:
1 16.3346384
2 11.43483
3 1.19819
4 1.1113829
5 1.0953443
6 1.9458343
7 1.345645
8 1....
- 407
1
vote
1
answer
51
views
Report sed changes + corresponding perl syntax
Newbie learning Linux and perl:
I would like to (a) search-replace strings, (b) match filename pattern .myfile., (c) look recursively in subdirectories, and (d) print the line number, file name, ...
- 13
1
vote
7
answers
313
views
Find all lines between two patterns, EXCLUSIVE of the second pattern?
Consider that I have the file listed below. I need to select all lines from every instance of the regex pattern Word A to before the regex pattern Word D.
Word A
Word B
Word C
Word D
Word E
Word F
...
- 1,144
-2
votes
3
answers
120
views
bash + how to verify folders under specific path are ended with number/s
I want to check the folder/s under /var/kafka that all them are ended with number otherwhile I will exit with error
ls -ltr /var/kafka
drwxr-xr-x 399 kafka kafka 28672 Nov 9 13:10 data6
drwxr-xr-x ...
- 13.4k
-1
votes
3
answers
152
views
Replace new lines at end for those lines whose 2nd field in colon separated file span over to multiple line
I have got multiple files with different set of contents but the pattern is same across mulitple lines in different files.
sample input file : cat -n test.txt
1 adjfkhjdhfkjd: ...
5
votes
4
answers
697
views
awk add a column if it doesn't exist
I would like to add a column 3 (description) if it does not exist in a ';' delimited file. example;
#Gene;Transcripts;Description;Group
gene1;G1a,G1b,G1c;gene1 is a good gene;6
gene2;G2a,G2b,G2c;gene2 ...
- 139
0
votes
4
answers
658
views
Remove hostnames from URL with sed/awk
I got lists of urls with different domains and I want the hostname removed with sed, awk or something similar and only keep the path. There are no urls with port or username@password in it.
input:
...
- 347
-1
votes
3
answers
132
views
How to replace the contents of out.txt with in.txt in a third file?
I have three files, main.txt, out.txt and in.txt. I want to replace every occurrence of the contents of out.txt in main.txt with the contents of in.txt.
Both out.txt and in.txt may contain multiple ...
- 17
0
votes
2
answers
525
views
Remove multiple occurrences using SED command
We had a requirement to remove all /t characters that are not followed by quotes
sed 's/\\t\([^"]\)/foo\1/g'
this command worked good for single occurrence. What option do we need to add remove ...
- 1
1
vote
2
answers
2k
views
How may I replace a string in an XML file?
I am trying to replace the string inside an XML file.
From
<hello="value" exampleno="xxxx:yyyyyyyy/dd=eeeee-ffffff,aa=bb ccc,dd=eeee,ff=gggg,hh=iii,jj=kkk,ll=mmmm" />
I want ...
- 19
1
vote
6
answers
935
views
Find and replace a multi line text file in another multi line text file
I fought with it for so long but I am now completely out of ideas. Maybe someone here will be able to help me. Here is what I want to achieve:
file_1.txt:
# Some comment
some_variable="test"
...
- 121
5
votes
5
answers
780
views
How can I replace multiple substrings from multiple lines in a file matching a pattern from a different file?
I have a file that contains multiple IP addresses and hostnames, and another file that contains some folders with many IP addresses per line.
ip_hostname.txt
host1 10.1.1.1
host2 10.2.2.2
host3 10.3.3....
- 51