An error is reported when the php Command executes the shell script.

Error cause: the specific sort command grep & #039; download & #039; test. log | awk & #039; {print $2} & #039; | sort-r | uniq-c | sort-nr | head-n10 | less & quot; error understanding, PS: The execution result is correct. Guess: sort first writes the content of this file into 1...

Error cause: sort

Specific command grep 'Download' test. log | awk '{print $2}' | sort-r | uniq-c | sort-nr | head-n 10 | less"

Error

If you understand this, explain the cause. PS: The execution result is correct.

Guess:
Sort first writes the content of the file to a temporary file, and then sorts and writes the output result.

Note:
Similar issues on Baidu
Http://wapiknow.baidu.com/question/466815745.html

Reply content:

Error cause: sort

Specific command grep 'Download' test. log | awk '{print $2}' | sort-r | uniq-c | sort-nr | head-n 10 | less"

Error

If you understand this, explain the cause. PS: The execution result is correct.

Guess:
Sort first writes the content of the file to a temporary file, and then sorts and writes the output result.

Note:
Similar issues on Baidu
Http://wapiknow.baidu.com/question/466815745.html

1. Where did your sort program come from? It has been confirmed that GNU sort 8.24 will not report such a noisy error. In fact, GNU coreutils has never been so stupid.

2. From PHP, it doesn't make sense to add less. Only 10 rows of data. Is it meaningless to use less?

Note:
Baidu's information on programming technology is slag.