题解 | #打印文件的最后5行#

num=0 while read line || [ -n "${line}" ] do

num=$[[$num + 1] done < nowcoder.txt

while read line || [ -n "$line\mathrm{"}]doif[\{line\}"\; ]\; do\; if\; [$num -le 5 ] && [ $num-ge0]thenechonum\; -ge\; 0\; ]\; then\; echo$line fi num=$[[$num - 1]

done < nowcoder.txt