[linux] stderr

https://blog.longwin.com.tw/2013/03/stdin-stdout-stderr-redirection-2013/

• 0: stdin (Standard input) 標準輸入串流 (鍵盤輸入)
• 1: stdout (Standard output) 標準輸出串流 (輸出於 Cli 視窗)
• 2: stderr (Standard error) 標準錯誤輸出串流 (輸出於 Cli 視窗)

簡單易懂的圖片可見(取自: Standard streams - Wikipedia, the free encyclopedia):

The standard streams for input, output, and error

 

save terminal output to a filele/420983 

redirect the output to a file:

someCommand > someFile.txt  

Or if you want to append data:

someCommand >> someFile.txt

If you want stderr too use this:

someCommand &> someFile.txt  

or this to append:

someCommand &>> someFile.txt