Redirect stderr and stdout to different files

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Here the “File Not Found” message is the STDERR and the rest was for STDOUT. Now if you want to redirect the whole output to a file, just running the command dir nosuchfile.txt > result.log will not cut it. You need to do one of the following: Sending the STDERR and STDOUT to different files: Hi friends I am facing one problem while redirecting the out of the stderr and stdout to a file let example my problem with a simple example I have a file (say test.sh)in which i run 2 command in the background ps -ef & ls & and now i am run this file and redirect the output to a file... In the above program, we use fprintf() statement where it redirects the output message and send it to the file using stdout. Now let us see if we use stderr it will not redirect the output message to the file instead it works the same as the above program it will print the output on the console. This can be done using the below program. Example #3 In the above program, we use fprintf() statement where it redirects the output message and send it to the file using stdout. Now let us see if we use stderr it will not redirect the output message to the file instead it works the same as the above program it will print the output on the console. This can be done using the below program. Example #3 Here the “File Not Found” message is the STDERR and the rest was for STDOUT. Now if you want to redirect the whole output to a file, just running the command dir nosuchfile.txt > result.log will not cut it. You need to do one of the following: Sending the STDERR and STDOUT to different files: Hi, i know how to a) redirect stdout and stderr to one file, b) and write to two files concurrently with same output using tee command Now, i want to do both the above together. I have a script and it should write both stdout and stderr in one file and also write the same content to another file at the same time. I'm trying to redirect all output (stdout + stderr) of a DOS command to a single file: C:\>dir 1> a.txt 2> a.txt The process cannot access the file because it is being used by another pro... Redirecting Stdout and Stderr Together. We can also redirect both stdout and stderr to /dev/null. Now nothing is displayed at all: $ ./testme hello world > /dev/null 2>/dev/null $ There is also another way to say "and send stderr to wherever stdout is going" by referring to stdout as "&1"; the shell will substitute this with /dev/null, since ... I'm trying to redirect all output (stdout + stderr) of a DOS command to a single file: C:\>dir 1> a.txt 2> a.txt The process cannot access the file because it is being used by another pro... I'm trying to redirect all output (stdout + stderr) of a DOS command to a single file: C:\>dir 1> a.txt 2> a.txt The process cannot access the file because it is being used by another pro... To redirect stdout to a truncated file in Bash, I know to use: cmd > file.txt To redirect stdout in Bash, appending to a file, I know to use: cmd >> file.txt To redirect both stdout and stderr to a truncated file, I know to use: cmd &> file.txt How do I redirect both stdout and stderr appending to a file? cmd &>> file.txt did not work for me. Or, you can redirect the output to one place, and the errors to another. dir file.xxx > output.msg 2> output.err You can print the errors and standard output to a single file by using the "&1" command to redirect the output for STDERR to STDOUT and then sending the output from STDOUT to a file: dir file.xxx 1> output.msg 2>&1 Jun 23, 2014 · Syntax to redirect both output (stdout) and errors (stderr) to different files The syntax: command1 > out.txt 2 > err.txt command2 -f -z -y > out.txt 2 > err.txt I know how redirect stderr to file using dup2: err := syscall.Dup2(int(fatal_logfile.Fd()), int(os.Stderr.Fd())) But then I don't see how can redirect this another time to stdout. Like "copying" one stream-source to two differents streams. Just a note, this functionality is called when the app starts and used to redirect stderr when, for ... Jul 21, 2016 · To redirect both STDOUT and STDERR to the same file with one Unix/Linux command, use this syntax: my-shell-script.sh > /dev/null 2>&1 As you can see in this command, I'm redirecting STDOUT to /dev/null as normal, and then the special 2>&1 syntax tells your Bash shell to redirect STDERR to STDOUT (which is already pointing to /dev/null ). Jan 16, 2019 · How to redirect stdout to a file. The standard output (stdout) redirect to file is as follows: command > file ls > /tmp/list.txt cat /tmp/list.txt OR command 1> file ls 1> /tmp/list.txt cat /tmp/list.txt The ls > /tmp/list.txt is just a shortcut for ls 1> /tmp/list.txt. KSH redirect stderr to a file Here the “File Not Found” message is the STDERR and the rest was for STDOUT. Now if you want to redirect the whole output to a file, just running the command dir nosuchfile.txt > result.log will not cut it. You need to do one of the following: Sending the STDERR and STDOUT to different files: May 23, 2007 · It is not that hard if you know howto redirect stderr, stdout and small command called tee. => fd0 is stdin => fd1 is stdout => fd2 is stderr. There are two formats for redirecting standard output and standard error: &>word and >&word. For example anything written to fd2 to the same place as output to fd1, you will use: 2>&1 Here the “File Not Found” message is the STDERR and the rest was for STDOUT. Now if you want to redirect the whole output to a file, just running the command dir nosuchfile.txt > result.log will not cut it. You need to do one of the following: Sending the STDERR and STDOUT to different files: Hereblock cmds stdout/stderr are sent to a single file and display. sudo -s -u username <<'EOF' 2>&1 | tee out ls; pwd; EOF Hereblock cmds stdout/stderr are sent to separate files and stdout to display. Stdin is file 0, stdout is file 1, and stderr is file 2. Redirection. A very common task in batch files is sending the output of a program to a log file. The > operator sends, or redirects, stdout or stderr to another file. For example, you can write a listing of the current directory to a text file: DIR > temp.txt Jun 23, 2014 · Syntax to redirect both output (stdout) and errors (stderr) to different files The syntax: command1 > out.txt 2 > err.txt command2 -f -z -y > out.txt 2 > err.txt May 23, 2007 · It is not that hard if you know howto redirect stderr, stdout and small command called tee. => fd0 is stdin => fd1 is stdout => fd2 is stderr. There are two formats for redirecting standard output and standard error: &>word and >&word. For example anything written to fd2 to the same place as output to fd1, you will use: 2>&1 To redirect stderr as well, you have a few choices: Redirect stdout to one file and stderr to another file: command > out 2>error Redirect stdout to a file ( >out ), and then redirect stderr to stdout ( 2>&1 ): command >out 2>&1 Redirect both to a file (this isn't supported by all shells, bash and ... Jan 16, 2019 · How to redirect stdout to a file. The standard output (stdout) redirect to file is as follows: command > file ls > /tmp/list.txt cat /tmp/list.txt OR command 1> file ls 1> /tmp/list.txt cat /tmp/list.txt The ls > /tmp/list.txt is just a shortcut for ls 1> /tmp/list.txt. KSH redirect stderr to a file Here the “File Not Found” message is the STDERR and the rest was for STDOUT. Now if you want to redirect the whole output to a file, just running the command dir nosuchfile.txt > result.log will not cut it. You need to do one of the following: Sending the STDERR and STDOUT to different files: 1>>filename # Redirect and append stdout to file "filename". 2>filename # Redirect stderr to file "filename". 2>>filename # Redirect and append stderr to file "filename". &>filename # Redirect both stdout and stderr to file "filename". In the above program, we use fprintf() statement where it redirects the output message and send it to the file using stdout. Now let us see if we use stderr it will not redirect the output message to the file instead it works the same as the above program it will print the output on the console. This can be done using the below program. Example #3 I'm trying to redirect all output (stdout + stderr) of a DOS command to a single file: C:\>dir 1> a.txt 2> a.txt The process cannot access the file because it is being used by another pro... In the above example, the ls command tries to display two files. For one file it gets success and for the other, it gets error. So what I did here is to redirect the stdout to ouput.txt (with >) and the stderr to the error.txt (with 2>). You can also redirect both stdout and stderr to the same file.