Linux 重新導向與管道

Linux 重新導向與管道
標準輸出重新導向

">" 操作符：覆蓋目標檔案內容

bkjia@bkjia:~/bkjia/linux/cmdline$ date > foobkjia@bkjia:~/bkjia/linux/cmdline$ cat fooFri May 8 09:55:42 CST 2015

">>" 操作符：在目標檔案尾部追加輸出內容

bkjia@bkjia:~/bkjia/linux/cmdline$ date >> foobkjia@bkjia:~/bkjia/linux/cmdline$ cat fooFri May 8 09:55:42 CST 2015Fri May 8 09:57:02 CST 2015

標準錯誤重新導向

"2>" 操作符：覆蓋目標檔案內容

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

"2>>" 操作符：在目標檔案尾部追加輸出內容

bkjia@bkjia:~/bkjia/linux/cmdline$ ls inexistent_dir 2>> ls-error.txt bkjia@bkjia:~/bkjia/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

將標準輸出與標準錯誤重新導向到同一檔案

"&>" 操作符：覆蓋目標檔案內容

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

"&>>" 操作符：在目標檔案尾部追加輸出內容

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

 

標準輸入重新導向

"<" 操作符

bkjia@bkjia:~/bkjia/linux/cmdline$ echo 'hello world' > foobkjia@bkjia:~/bkjia/linux/cmdline$ cat < foohello world 

管道

"|" 操作符

 

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

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