摘要：
Typically, the syntax of these characters is as follows, using to redirect output.command1 > file1executes command1, placing the outp... 阅读全文
摘要：
That part is written to stderr, use 2> to redirect it. For example:foo > stdout.txt 2> stderr.txtor if you want in same file:foo > all... 阅读全文
摘要：
2>&1 # Redirects stderr to stdout. # Error messages get sent to same place as standard output. >>filename 2>&1 ... 阅读全文
摘要：
here are three types of I/O, which each have their own identifier, called a file descriptor:standard input: 0standard output: 1standar... 阅读全文