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bombless/knowledge.sh

Last active May 26, 2023 08:44
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新学的命令行
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knowledge.sh
# 读取当前目录下这些目录中各有多少文件
ls . |awk -F ' ' '{("find "$1" |wc -l") | getline n;print n "\t" $1}'
# 从命令输出而不是文件名得到一个文件流重定向
awk '{print "hello,",$0}' <(echo mr. white)
# 在命令的任意位置指定重定向到文件
echo Hello, world. > hello Nice to meet you!
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