dev/zero是什么意思
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发布时间：2022-04-26 21:09
共1个回答
热心网友
时间：2023-11-02 18:07
/dev/zero------该设备无穷尽地提供0，可以使用任何你需要的数目——设备提供的要多的多。他可以用于向设备或文件写入字符串0。
oracle@localhost oracle]$if=/dev/zero of=./test.txt bs=1k count=1
oracle@localhost oracle]$ ls -ltotal 4
-rw-r--r-- 1 oracle dba 1024 Jul 15 16:56 test.txteg,
find / -name access_log 2>/dev/null
这样，一些诸如一些错误信息就不会显示出来。
/dev/zero：
In Unix-like operating systems, /dev/zero is a special file that provides as many null characters (ASCII NULL, 0x00; not ASCII character "digit zero", "0", 0x30) as are read from it. One of the typical uses is to provide a character stream for overwriting information. Another might be to generate a clean file of a certain size. Using mmap to map /dev/zero to RAM is the BSD way of implementing shared memory.
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