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how can we remove last 7 lines of file in unix [duplicate]

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How to delete all the lines after the last occurence of pattern?

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Use sed, grep, or awk without perl to replicate positive lookbehind

json regex bash awk sed

How do i get the value present in first double quotes?

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grep or sed for word containing string

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running sed with two instructions

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Find and Replace with Spaces using Sed Mac Terminal

macos bash csv sed terminal

How to insert 4 newlines before pattern match with SED?

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Echo or preview text changed using sed -i

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How to use sed to replace multiline string?

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Replace the "pattern" on second-to-last line of a file

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Use output of one command as replacement text in sed

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How to extract a substring matching a pattern from a Unix shell variable

regex unix shell sed grep

how to display all lines from one that match regex in linux

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grep on unix / linux: how to replace or capture text?

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Command to trim the first and last character of a line in a text file

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Using sed to change /etc/fstab

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Delete line from text file with line numbers from another file

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Is there a difference in efficiency between pipelined sed invocations and multiple sed expressions?

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Using backticks or $() with xargs and sed or awk

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