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Commands tagged stdout

Terminal - Commands tagged stdout - 8 results

cat file.txt > /dev/null

2012-06-26 18:34:12

User: ankush108

Functions: cat

Tags: error stdout messages stdou dev/null

Up
Down

Suppress standard output using > /dev/null

This will be very helpful when you are debugging shell scripts, where

you don?t want to display the echo statement and interested in only

looking at the error messages. Similarly use 2> to supress error messages

#!/bin/zsh SHL='\\e[0;31m' EHL='\\e[0m' while read line; do TEXT=$line for SSTR in $*; do TEXT=$(echo $TEXT | sed -e "s:$SSTR:${SHL}${SSTR}${EHL}:g") done echo -e $TEXT done

2012-06-06 12:57:50

User: steigr

Functions: echo read sed

Tags: color stdout zsh highlight

Up
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highlight chars or words in program output

save as shell script and pipe your command output

TIME=$( { time YOUR_COMMAND_HERE; } 2>&1 ) ; echo $TIME

2010-11-18 15:48:05

User: allrightname

Functions: echo time

Tags: bash stdout time redirecting output built-in

Up
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Redirect bash built-in output to stdout

I've had a horrible time trying to pipe the output of some shell built-ins like 'time' to other programs. The built-in doesn't output to stdout or stderr most of the time but using the above will let you pipe the output to something else.

strace -e write=1,2 -p $PID 2>&1 | sed -un "/^ |/p" | sed -ue "s/^.\{9\}$.\{50\}$.\+/\1/g" -e 's/ //g' | xxd -r -p

2010-10-06 19:37:39

User: glaudiston

Functions: sed strace

Tags: output stdout strace stderr

Up
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intercept stdout/stderr of another process or disowned process

Useful to recover a output(stdout and stderr) "disown"ed or "nohup"ep process of other instance of ssh.

With the others options the stdout / stderr is intercepted, but only the first n chars.

This way we can recover ALL text of stdout or stderr

exec 2>&1

2010-08-05 08:24:18

User: redy

Functions: exec

Tags: bash redirection exec stdout redirect redirecting output stderr

Up
Down

Setting global redirection of STDERR to STDOUT in a script

You have a script where =ALL= STDERR should be redirected to STDIN and you don't want to add "2>&1" at the end of each command...

E.G.:

ls -al /foo/bar 2>&1

Than just add this piece of code at the beginning of your script!

I hope this can help someone. :)

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

2010-04-23 16:22:17

User: systemj

Functions: cut grep sed strace

Tags: output stdout strace stderr

Up
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intercept stdout/stderr of another process

similar to the previous command, but with more friendly output (tested on linux)

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

strace -ff -e trace=write -e write=1,2 -p SOME_PID

2010-04-20 08:55:54

User: oernii2

Functions: strace

Tags: output stdout strace stderr

Up
Down

intercept stdout/stderr of another process

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

command > tmp && cat logfile.txt >> tmp && tmp > logfile.txt && rm tmp

2009-04-05 22:00:32

User: akoumjian

Functions: cat command rm

Tags: file redirection output stdout beginning redirect

-2

Up
Down

Append output to the beginning of a file.

Adds the stdout (standard output) to the beginning of logfile.txt. Change "command" to whatever command you like, such as 'ls' or 'date', etc. It does this by adding the output to a temporary file, then adding the previous contents of logfile.txt to the temp file, then copying the new contents back to the logfile.txt and removing the temp file.

Comments (7) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate