如何查找具有连续名称的丢失文件？

Question

我有数千个文件名为 1.txt 2.txt 等等。其中一些文件丢失了。找出哪些文件丢失的最简单方法是什么？

Answer 1

ub=1000 # Replace this with the largest existing file's number.
seq "$ub" | while read -r i; do
    [[ -f "$i.txt" ]] || echo "$i.txt is missing"
done

您可以ub通过执行ls | sort -n或类似操作轻松找到合适的值。这依赖于格式为 输出的文件seq，特别是这里没有前导零。

Answer 2

$ ls
1.txt  3.txt
$ seq 1 10 | xargs -I {} ls {}.txt >/dev/null
ls: cannot access 2.txt: No such file or directory
ls: cannot access 4.txt: No such file or directory
ls: cannot access 5.txt: No such file or directory
ls: cannot access 6.txt: No such file or directory
ls: cannot access 7.txt: No such file or directory
ls: cannot access 8.txt: No such file or directory
ls: cannot access 9.txt: No such file or directory
ls: cannot access 10.txt: No such file or directory
$