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[操作系统]Linux 重定向与管道


标准输出重定向

">" 操作符:覆盖目标文件内容

huey@huey-K42JE:~/huey/linux/cmdline$ date > foohuey@huey-K42JE:~/huey/linux/cmdline$ cat fooFri May 8 09:55:42 CST 2015

">>" 操作符:在目标文件尾部追加输出内容

huey@huey-K42JE:~/huey/linux/cmdline$ date >> foohuey@huey-K42JE:~/huey/linux/cmdline$ cat fooFri May 8 09:55:42 CST 2015Fri May 8 09:57:02 CST 2015

 

标准错误重定向

"2>" 操作符:覆盖目标文件内容

huey@huey-K42JE:~/huey/linux/cmdline$ ls inexistent_dir 2> ls-error.txt huey@huey-K42JE:~/huey/linux/cmdline$ cat ls-error.txt ls: cannot access inexistent_dir: No such file or directory

"2>>" 操作符:在目标文件尾部追加输出内容

huey@huey-K42JE:~/huey/linux/cmdline$ ls inexistent_dir 2>> ls-error.txt huey@huey-K42JE:~/huey/linux/cmdline$ cat ls-error.txt ls: cannot access inexistent_dir: No such file or directoryls: cannot access inexistent_dir: No such file or directory

 

将标准输出与标准错误重定向到同一文件

"&>" 操作符:覆盖目标文件内容

huey@huey-K42JE:~/huey/linux/cmdline$ date &> foohuey@huey-K42JE:~/huey/linux/cmdline$ cat fooFri May 8 10:16:12 CST 2015huey@huey-K42JE:~/huey/linux/cmdline$ ls inexistent_dir &> foo huey@huey-K42JE:~/huey/linux/cmdline$ cat fools: cannot access inexistent_dir: No such file or directory

"&>>" 操作符:在目标文件尾部追加输出内容

huey@huey-K42JE:~/huey/linux/cmdline$ echo 'hello world' > foohuey@huey-K42JE:~/huey/linux/cmdline$ date &>> foohuey@huey-K42JE:~/huey/linux/cmdline$ ls inexistent_dir &>> foo huey@huey-K42JE:~/huey/linux/cmdline$ cat foohello worldFri May 8 10:25:24 CST 2015ls: cannot access inexistent_dir: No such file or directory

 

标准输入重定向

"<" 操作符

huey@huey-K42JE:~/huey/linux/cmdline$ echo 'hello world' > foohuey@huey-K42JE:~/huey/linux/cmdline$ cat < foohello world

 

管道

"|" 操作符

huey@huey-K42JE:~/huey/linux/cmdline$ ls /usr/bin | grep '^zip'zipzipcloakzipgrepzipinfozipnotezipsplit