Command output redirection to file issues Post: 302999195

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Redirection of output to a log file

Apologies for the trivial nature of this question but I cannot seem to get a simple re direct to a log file to work Step 1 touch log.txt at -f batch.sh now >> log.txt I am trying to get the batch.sh contents into the log file Manny Thanks

2. Shell Programming and Scripting

Remote server file output redirection

Hi, I want ssh to the remote server and then execute ls and redirect the output to the file in remote server itself like ssh root@$server `ls /var/log/users.txt > root@$server:/home/users.txt` Can you please let me know the correct syntax for it. Thanks in advance

3. UNIX for Dummies Questions & Answers

Output file redirection

Suppose I have a file named a When I write cat a>a The following error message is displayed cat: a: input file is output file and my file a is truncated to zero size. Also the exit status of the last command is 1 Can someone tell me what actually happens when I do so?

4. UNIX for Dummies Questions & Answers

Capping output redirection log file length

I am trying to write a script which will output notifications to a logfile, but I would like to cap the logfile to, let's say, 200 lines. Specifically I am using custom firmware, DD-wrt, on my router and I am implementing a script to connect to my work vpn. I have a loop that pings a computer...

5. Shell Programming and Scripting

awk output redirection to file

I have a system stat command running which generates data after 5 sec or so. I pass this data to awk and do some calculation to present the data differently. Once done now I want to pass this data to file as and when generated but doesn't work..unless the first command completes successfully....

6. Shell Programming and Scripting

Help with tar --append command output redirection

I am using tar command to append daily database backups on tape. "tar --append " command help me to do this. But tar --append command does not produce any output on stdout if it succeed. I want the output for that appended command to a log file. This log file should contain only the name of the...

7. Shell Programming and Scripting

output redirection to existing file question

So I have a existing file that I used the uniq command on and I need to save the output to the same file without changing the file name. I have tried $ uniq filename > filename then when I cat the file it then becomes blank like there is nothing inside. any help would be much appreciated...

8. UNIX and Linux Applications

output redirection command

Dear All, ./waf --run scratch/myfirst > log.out 2>&1 The above is a command line to redirect the output to a file called log.out. what is the 2>&1 part for ? Thank you

9. Shell Programming and Scripting

Command output redirection in script not working

I need to count the number of lines in a .txt file and put it in a variable. I am using the following code #!/bin/bash count = $(wc -l "some file.txt" | awk '{print$1}') echo $count It is giving the following error. line3: count: command not foundWhat am I doing wrong here? :confused:

10. Shell Programming and Scripting

Output redirection of c binary file to a file in shell script is failing

I am struck up with a problem and that is with output redirection. I used all the ways for the redirection of the output of c binary to a file, still it is failing. Here are the different ways which I have used: ./a.out | tee -a /root/tmp.txt 2>&1 ./a.out | tee -a /root/tmp.txt 1>&1 ./a.out |...

LEARN ABOUT CENTOS

envsubst

ENVSUBST(1)								GNU							       ENVSUBST(1)

NAME

       envsubst - substitutes environment variables in shell format strings

SYNOPSIS

       envsubst [OPTION] [SHELL-FORMAT]

DESCRIPTION

       Substitutes the values of environment variables.

   Operation mode:
       -v, --variables
	      output the variables occurring in SHELL-FORMAT

   Informative output:
       -h, --help
	      display this help and exit

       -V, --version
	      output version information and exit

       In  normal  operation  mode, standard input is copied to standard output, with references to environment variables of the form $VARIABLE or
       ${VARIABLE} being replaced with the corresponding values.  If a SHELL-FORMAT is given, only those environment variables that are referenced
       in SHELL-FORMAT are substituted; otherwise all environment variables references occurring in standard input are substituted.

       When --variables is used, standard input is ignored, and the output consists of the environment variables that are referenced in SHELL-FOR-
       MAT, one per line.

AUTHOR

       Written by Bruno Haible.

REPORTING BUGS

       Report bugs to <bug-gnu-gettext@gnu.org>.

COPYRIGHT

       Copyright (C) 2003-2007 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The full documentation for envsubst is maintained as a Texinfo manual.  If the info and envsubst programs are properly  installed  at  your
       site, the command

	      info envsubst

       should give you access to the complete manual.

GNU gettext-runtime 0.18.2					    March 2013							       ENVSUBST(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Redirection of output to a log file

Discussion started by: JohnCrump

2. Shell Programming and Scripting

Remote server file output redirection

Discussion started by: mohitmoudgil

3. UNIX for Dummies Questions & Answers

Output file redirection

Discussion started by: aagajaba

4. UNIX for Dummies Questions & Answers

Capping output redirection log file length

Discussion started by: joemommasfat