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Bash Scripting Tutorial #31 How to perform string substitution or find and replace in Bash? - YouTube
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SOLVED] Fixing the 'Bash: Bad Substitution' Error
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ben on X: "Strings everywhere: Bash has some amazing string manipulation techniques which can replace sed,awk most of the times. I found it helpful many times than writing long pattern matching. So,
Shell Script to Perform String Replacement in a File - GeeksforGeeks
