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Bash history HISTFILE deduplication while preserving order
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| # backup HISTFILE | |
| cp ~/.bash_history{,.bak} | |
| # deduplicate - deprecated | |
| nl ~/.bash_history.bak | sort -k2,2 -k1,1nr | uniq -f1 | sort -k1,1n | cut -f2 > ~/.bash_history | |
| # dedupelicate | |
| cp ~/.bash_history{,.bak-$(date -I)} | |
| tac $HISTFILE | awk '!x[$0]++' | tac | sponge $HISTFILE |
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