批量改名

dummy@example.com (batsom) — Sun, 13 Nov 2022 10:13:20 +0000

csv改成txt
find . -type f -name "*.txt" -print0 | xargs -0 rename .txt .csv {}

去掉第二行为空的行
awk -F"," '{if($2 !="") print $1","$2}' 1204_txt > 1204bak.csv

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