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# 新建文件
> touch x.txt
> ls
x.txt
# 新建多个文件
> touch {a,b}.txt
> ls
a.txt b.txt
# 新建多个连续文件
> touch {1..10}.txt
> ls
10.txt 2.txt 4.txt 6.txt 8.txt
1.txt 3.txt 5.txt 7.txt 9.txt