error to dev null

1, Introduction--From the wiki interpretation/dev/null:In a Unix-like system, a/dev/null, or empty device, is a special device file that discards everything written to it (but reports a successful write operation) and reads it immediately to get an

For details about the/dev/null and/dev/zero files, and solutions for accidental deletion of/dev/null and/dev/zero, and the disk I/O Testing Method Using/dev/zero, disk deletion and recovery by mistake1. Introduction-explanation from

This article was reprinted from: 11595985By default, there are always three files open, standard input (keyboard input), standard output (output to screen), standard error (also output to screen), and their respective file descriptors are 0,1,2. So

By default, there are always three files open, standard input (keyboard input), standard output (output to screen), standard error (also output to screen), and their respective file descriptors are 0,1,2. So let's take a look at the differences

By default, there are always three files open, standard input (keyboard input), standard output (output to screen), standard error (also output to screen), and their respective file descriptors are 0,1,2. So let's take a look at the differences

This article goes from http://www.kissyu.org/backgroundWe can often find such statements in a shell script >/dev/null 2>&1 . Before I did not go into the role of this command, copy replicable, until last week I wrote this order accidentally 2>&1

Using/dev/null Think of/dev/null as a "black hole". It is very equivalent to a write-only file. All content written to it is lost forever. And trying to read content from it is nothing. However,/dev/null is very useful for both the command line and

The shell can often be seen: >/dev/null 2>&1The result of the command can be defined in the form of a%> output/dev/null represents an empty device fileWhere does the > delegate redirect to, for example: echo "123" >/home/123.txt1 means stdout

Transfer from http://blog.chinaunix.net/uid-25100840-id-3271224.html a few days ago interview has such a question, more strange: Explain the meaning of >/dev/null 2>&1: I was scratching, also did not think out, wrote a clear buffer, hehe online

The difference between/dev/null and/dev/zero/dev/null, nicknamed the Bottomless pit, you can output any data to it, it take all, and will not hold!/dev/zero, is an input device that you can use to initialize files. The device provides an exhaustive 0