1、
root@PC1:/home/test2# ls a.txt root@PC1:/home/test2# cat a.txt a b c d a b e f c d c d m n root@PC1:/home/test2# awk '{a[i++]=$0} END {for(j = i - 1; j >= 0; j--) print a[j]}' a.txt m n c d c d e f a b c d a b
tac不香吗? 不过awk数组是真强大。
root@PC1:/home/test2# ls a.txt root@PC1:/home/test2# cat a.txt a b c d a b e f c d c d m n root@PC1:/home/test2# tac a.txt m n c d c d e f a b c d a b
参考:https://mp.weixin.qq.com/s?__biz=MzU5NDg5MzM5NQ==&mid=2247495592&idx=1&sn=0780cc96bc18bf3ba5b1b50e243a8e9a&chksm=fe78e094c90f698244a1acb0b33ab4cb9ab215dd86d4e227c6a12b2387de2f42ebadd024e517&mpshare=1&scene=23&srcid=0501IxzLQzAVxjYg4OhuPhnU&sharer_sharetime=1651338673976&sharer_shareid=50b75c6a886e09824b582fb782a7678b#rd