利用通配符号匹配文件名称信息
* 模糊匹配所有内容 ddk dlk dor ==> d*
find /opt -name "*.txt"
ls -lh /opt/*.txt
{} 生成序列信息(生成一行序列)
生成连续序列
echo {1..10}
echo {01..10}
echo {01..005}
生成不连续序列
echo {1..10..2} 奇数序列
echo {2..10..2} 偶数序列
echo {ddd,xxx,www}
生成组合序列
echo {a..c}{01..03}
echo {01..03}{a..c}{A..C}
echo {A,B}{01,02}
echo A{01,02}
echo A{,02}
例子
cp /opt/test.txt /opt/test.txt.bak
echo test.txt{,bak}
echo test.txt{,.bak}
echo /opt/text.txt{,.bak}
cp /opt/text.txt{,.bak}