How to redirect stderr and stdout to different files in the same line in script

Question

I know this much     command 2 gt  gt  error    command 1 gt  gt  output   Is there any way I can output the stderr to the error file and output stdout to the output file in the same line of bash

User · Answer

Like that     command  gt  gt output 2 gt  gt error

User · Answer

Or if you like to mix outputs  stdout  amp  stderr  in one single file you may want to use   command  gt  merged-output txt 2 gt  amp 1

User · Answer

Just add them in one line command 2 gt  gt  error 1 gt  gt  output  However  note that  gt  gt  is for appending if the file already has data  Whereas   gt  will overwrite any existing data in the file   So  command 2 gt  error 1 gt  output if you do  not want to append   Just for completion s sake  you can write 1 gt  as just  gt  since the default file descriptor is the output  so 1 gt  and  gt  is the same thing   So  command 2 gt  error 1 gt  output becomes  command 2 gt  error  gt  output

User · Answer

Try this   your command 2 gt stderr log 1 gt stdout log   More information  The numerals 0 through 9 are file descriptors in bash   0 stands for standard input  1 stands for standard output  2 stands for standard error  3 through 9 are spare for any other temporary usage   Any file descriptor can be redirected to a file or to another file descriptor using the operator  gt   You can instead use the operator  gt  gt  to appends to a file instead of creating an empty one   Usage   file descriptor  gt  filename  file descriptor  gt   amp file descriptor   Please refer to Advanced Bash-Scripting Guide  Chapter 20  I O Redirection

User · Answer

Multiple commands  output can be redirected   This works for either the command line or most usefully in a bash script   The -s directs the password prompt to the screen   Hereblock cmds stdout stderr are sent to seperate files and nothing to display   sudo -s -u username  lt  lt  EOF  2 gt err 1 gt out ls  pwd  EOF   Hereblock cmds stdout stderr are sent to a single file and display   sudo -s -u username  lt  lt  EOF  2 gt  amp 1   tee out ls  pwd  EOF   Hereblock cmds stdout stderr are sent to separate files and stdout to display   sudo -s -u username  lt  lt  EOF  2 gt err   tee out ls  pwd  EOF   Depending on who you are whoami  and username a password may or may not be required

[linux] How to redirect stderr and stdout to different files in the same line in script?

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