How to delete duplicate lines in a file without sorting it in Unix?
Tag : unix , By : Amin Amini
Date : March 29 2020, 07:55 AM
it fixes the issue Is there a way to delete duplicate lines in a file in Unix? awk '!seen[$0]++' file.txt
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How to delete first two lines and last four lines from a text file with bash?
Tag : linux , By : lietkynes
Date : March 29 2020, 07:55 AM
Any of those help You can combine tail and head: $ tail -n +3 file.txt | head -n -4 > file.txt.new && mv file.txt.new file.txt
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Delete consecutive duplicate lines using unix utilities
Tag : bash , By : user86493
Date : March 29 2020, 07:55 AM
will be helpful for those in need This sounds simple on its face but is actually somewhat more complex. I would like to use a unix utility to delete consecutive duplicates, leaving the original. But, I would also like to preserve other duplicates that do not occur immediately after the original. For example, if we have the lines: , You can do: cat file1 | uniq > file2
uniq file1 file2
O B
O B
C D
T V
O B
sort -u file1 > file2
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How do I delete lines matching multiple pattern in text file using bash command?
Tag : linux , By : inquiringmind
Date : March 29 2020, 07:55 AM
will be helpful for those in need I have a text file and want to delete lines that start with A, T, G or C. If it's only A, I could have done like this sed '/A/d' infile.txt, but how do you delete lines that start with A,T,G or C letters? , You could use sed: sed '/^[ATGC]/d' infile.txt
grep -v '^[ATGC]'
while read -r line; do [[ $line =~ ^[ATGC] ]] || echo "$line"; done < infile.txt
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How to delete duplicate lines in file in unix?
Date : March 29 2020, 07:55 AM
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