Questions tagged [stdout]
The stdout tag has no usage guidance.
61
questions
2
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1
answer
138
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Pipe to compressed file but also print content to terminal
How do I maintain a readable output from my program while also putting that same output into a compressed file, gzip or otherwise, so I can parse it later?
I run a command that generates a lot of ...
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0
votes
2
answers
120
views
STDOUT not performing as expected in script
Having just been helped to get my script functioning on directories with spaces in the name (question 1447738 - thank you, again), I thought I'd like to pass its output to a text file.
Here's the ...
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1
vote
1
answer
2k
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xxd on Linux 22.04 LTS - Can I write one small file into a larger file at a given offset without copy and pasting contents of small file?
I'm playing around with trying to set up patching copies of old GameBoy Pokemon games. I can do it all manually via other apps on Windows, and could maybe scrummage around for a Windows command line ...
- 65
0
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2
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75
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Not using > makes all the difference in opening gedit through terminal w/o errors or locking the terminal
I have been experimenting with using terminal to open gedit with any type of file it is capable of using and not having the terminal blocked until the file is closed OR have any error messages in the ...
- 103
3
votes
3
answers
2k
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How can I view the stdout / stderr from the bash login shell?
I'm trying to debug a strange issue with my ~/.bash_profile, and I'd like to be able to see if there are any errors / etc printed when it's run. Is there some log or such somewhere that contains the ...
- 131
0
votes
1
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819
views
How to display error messages during .configure to the standard console?
When compiling from source, we use .configure as the first step. .configure may call some other commands like cc which may fail and print error messages, like header not found or some other compile ...
- 227
0
votes
1
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342
views
How to prevent the gio open command from outputting texting in the console?
I use the gio open command very often, so what I have done is I added an alias for it in the .bashrc file
alias open="gio open"
Hence, I can simply write open . or open ~/Pictures/example....
- 123
0
votes
1
answer
1k
views
Automatically enter user input several times to command stdin
I need to perform a conversion of digital certificates from pfx to pem on an external application from which I can run system commands. I can do this from CLI by using the command:
openssl pkcs12 -in ...
- 103
0
votes
1
answer
305
views
Retrieve information from running process
I often force process to not display their output so that I can more easily run multiple of them in the background, for example:
youtube-dl -f 22 https://www.youtube.com/watch?v=oyg0xYH12Qg &>/...
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0
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0
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121
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Accidentally ran wget -O-, and it outputted stdout to terminal
Accidentally ran wget -O- https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-boost-8.0.22.tar.gz with the -O- thing, and it outputted random stuff to terminal. Is it possible that it could've done ...
- 197
0
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1
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791
views
How to use find command and filter error messages
I'm running this command : find / | grep corectrl | grep log
And I get a lot of permission denied errors and I would like to send stderr to null
- 1,980
1
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1
answer
1k
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Pipe password argument to mount shell command
Status quo
Given are following /etc/fstab mount points:
//server/app /home/user/server/app cifs noauto,user,vers=3.11 0 0
//server/code /home/user/server/code cifs noauto,user,vers=3.11 0 0
These ...
- 151
11
votes
1
answer
13k
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Why should apt-key output not be parsed?
To validate that the docker gpg key is installed, I ran:
sudo apt-key fingerprint 0EBFCD88 | grep "9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88"
Which resulted in the following output:...
- 213
3
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4
answers
6k
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How to redirect the output of a command to a function but suppress the error and output to console?
I need to redirect the output of a command that I am running to a log file with timestamp (hence a function instead of the log file itself) but the error and the output, both should not be showing in ...
- 33
1
vote
2
answers
352
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(K)ubuntu 19.10 can't print text files from console
I have trouble with printing system on my Kubuntu 19.10
I tried so many things that i can't track completely, but the following is the core of the problem.
$ echo "test" | lp -d Boomaga
request id ...
- 11
1
vote
1
answer
781
views
Failing to Redirect Output to File
I want to redirect output from "time" to a file. However, my attempts to redirect stdout, stderr, or both, are not working. For example, when I use:
time python process-column.py 2>/tmp/times....
- 111
8
votes
3
answers
7k
views
systemd service output to terminal/pty
I am not able to figure out what option to pass in StandardOutput= for a
unit file (.service), where I want to show some messages on the connected terminal
from where the service is started! (console/...
- 89
1
vote
1
answer
3k
views
SSH local STDOUT to file on remote server
I need to copy output from local command to remote server
f.e:
user@localhost$ ls | scp - user@remotehost:/user/remotefile
got an error:
-: No such file or directory
sorry, but a cannot identify ...
- 11
2
votes
0
answers
72
views
OS laggy after echoing a string in file descriptors 0,1,2 (stdin, stdout, stderr)
I was trying to exploit capacity leaking to a C program (see below), by taking advantage of the non-existence of fclose() function to a file, that the program previously opened.
In short, the ...
- 133
1
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0
answers
63
views
Is there a terminal utility that I can use to 'occasionally' record stdout for long running processes?
An example would be the badblocks. Just now I was using it as sudo badblocks -sv /dev/sdb
This utility takes a long time to work. Particularly for large disks from years ago that aren't in the best ...
- 11
5
votes
2
answers
2k
views
Piping the output of comand columns
I am using lolcat to get the output of ls in color. To do this i have copied /usr/bin/ls to /usr/bin/lsslss (to avoid an endless loop since alias cannot acccept $* or $@) and I have added the function:...
- 103
22
votes
3
answers
14k
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What is the meaning of & at the end of a command?
I have a startup script line:
pyprogramm >> /dev/null 2>&1 &
Meanings:
>> /dev/null - redirect stdout to null device
2>&1 - redirect stderr to stdout (that is ...
- 4,467
-2
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1
answer
353
views
What is the stdout output in stream-redirection labs?
Inside the ‘stream-redirection’ folder there is a program called ‘program’. When you run this it will output to stdout and stderr.
What is the stdout output?
I have tried ./program, but it did not ...
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3
votes
1
answer
408
views
Bash file redirection bug?
From what I understand about program IO, there are stdin, stdout, and stderr data streams (and a return code). stdout and stderr are the two data output streams. So if I use bash redirection to close ...
- 193
2
votes
0
answers
277
views
Print netplan config
Does netplan have any options available for writing how it interprets its config files to stdout, an arbitrary directory, or something similar?
The context for my question is that I'm updating a ...
- 21
0
votes
0
answers
333
views
Output logs to dynamically created folder structure (based on the current date), using upstart to create the service
I have the following upstart configuration:
start on runlevel [2345]
stop on runlevel [06]
respawn
respawn limit 99 5
#respawn is used to start the nodejs again, even if it fails.
env NODE_ENV=...
- 101
0
votes
0
answers
334
views
Error message was neither redirected to STDERR nor to STDOUT, but it was really exist when output logs to screen?
The following commands were ran in Ubuntu 16.04 and the version of python is 3.5. When I ran the python routine without data redirection
python3 opt_CNN2_dense.py
Screen output ResourceExhausted ...
- 21
0
votes
0
answers
385
views
Communicating with background service
I have a process registered as a service running in the background which occasionally logs to stdout. It is some linux executable which, if run in the foreground, can receive user commands and respond ...
- 101
1
vote
2
answers
1k
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bash retry function with silencer
I found a bash function, that let's me retry commands.
function retry {
local n=1
local max=50
local delay=1
while true; do
"$@" && break || {
if [[ $n -lt $max ]]; then
...
1
vote
2
answers
2k
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Git produces output in realtime to a file but I'm unable to echo it out in realtime directly in a while loop
What I want
My actual long term goal is bypassing all the output of a git process into another function (in order to make a progress bar - see my older question for more details about that).
What I'...
- 3,306
8
votes
2
answers
34k
views
How to get git producing output to a file?
I wanted to write the output of git clone to a file using
git clone https://github.com/someRepository > git_clone.file
But instead I get the output displayed/updated in the terminal like
...
- 3,306
0
votes
0
answers
160
views
Pipe stdout through sed or awk command BEFORE redirecting to file? [duplicate]
I am still kind of new to programming, but willing to learn: I am struggling with a problem in following project:
I am logging analog read-outs of an Arduino board.
The Arduino board sends tab-...
- 164
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0
answers
461
views
How to stop file-roller from outputting anything and hanging on the process
I'm writing a program that uses file-roller to extract an ISO file. However I keep getting a warning and I don't want to see this warning. Also file-roller hangs after this warning. Gtk-Message: ...
- 334
3
votes
1
answer
3k
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using ffmpeg in bash script prints video data to stdout
I'm writing a bash script to convert some videos
the problem is when I run ffmpeg directly in terminal it is OK and converts video correctly but when I use it in bash script it prints lots of data (...
- 494
0
votes
1
answer
1k
views
grep in bash-script doesn't print message in log file
I'm trying to write the output of a command to a log file using grep:
./exeFile dir1/file.conf | grep textError > logTest.txt &
But it doesn't write anything to the log file.
If I use ./...
- 3
1
vote
1
answer
110
views
How to write the most recent line of a process to a readable file
I’ve got a question for you that is theoretical.
While running a process in the terminal I often just care about the most recent last line. And I want to call the data in that line from another ...
- 201
4
votes
2
answers
4k
views
example of console output that is not written to standard output
It seems read does not write to standard output.
$ cat test.sh
#!/bin/bash
read -p "type a key and Enter" key
echo "the key was $key"
$ ./test.sh
type a key and Enterx
the key was x
$ ./test.sh | tee ...
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1
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1
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9k
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How do I save a shell's stderr and stdout to a file while still having it output to the terminal window? [duplicate]
I need stdout and stderr to a file, and my shell simultaneously.
command > file.txt, the usual goto, will not output stderr to the file, nor output stdout to the terminal.
command > file.txt &...
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0
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1
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175
views
How can I set the terminal to not automatically go to the last line if there the output in the terminal has been updated?
I have some programs that are continuously outputting data on the terminal.
I however want to be able to scroll up and down while the program is outputting all this data to the terminal, but every ...
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1
answer
383
views
How to use the output of ettercap
To encrypt tshark output, I use
tshark -w - | gpg -e > capture.pcap.gpg
How do I do the same for ettercap?
This command does not work
ettercap -M arp -w - -T //// | gpg -e > capture.pcap....
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2
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3k
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How to redirect dd progress in terminal to a log.txt file but still display it on the terminal during the process?
Here is my script :-
sudo mate-terminal --geometry=50x10 -x sh -c "dd if=/dev/sda of=/dev/sdb status=progress 2>&1 | tee log.txt | md5sum > hash.txt | sha1sum > hash1.txt"
I've seen ...
- 63
4
votes
2
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22k
views
STDOUT and STDERR redirection for nc
I am trying to make a watchdog bash script which has to check if the port is open, based on the exit status, otherwise should start the daemon. Problem is I can't manage to avoid the script outputting ...
-1
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1
answer
104
views
Some programs print errors to stdout instead of stderr, and don't set $? when an error occurs. Why? [closed]
See title. I've seen this twice recently, with both udisks and pacmd, and they are 100 times harder to script because of it. Why do programmers do this?
For example, I want to switch the audio output ...
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0
votes
1
answer
69
views
Why is stdin/stdout failing with gplay on ubuntu?
I am trying to change gplay's volume level programmatically in a Java app. The video plays fine; I see gplay's menu; I get my first "Playing" prompt, and I write a "v" for "[v]Volume" but I never see ...
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3
votes
1
answer
608
views
stderr of terminal in red, even with sudo
I am trying to make a working example for logrotate, and to help me through this I figured it was a good idea to turn stderr to red.
Through some reading, I came upon stderred, which I meant to adopt....
- 681
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1
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237
views
run a command, send output to mail with stderror colored
I have a script that writes to the STDOUT and STDERR. I can pipe the script to mail so it sends me an email of the output.
What I want to do now is have the STDERR of the output colored such that the ...
- 382
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1
answer
99
views
Why does man -P behave differently when the output is redirected or piped?
man -P whoami ls
This command will output user's name, just like whoami. But when you use pipe to redirect it to a file or to your screen like man -P whoami ls | cat or man -P whoami ls > file, ...
- 76
1
vote
0
answers
867
views
run a process in background and give stdout for it even if terminal is closed
I found some link here(Hide stdout of a process only when it is running in background) about redirecting running process' output but my case(a module logging to stdout) is a bit different.
Cause I am ...
- 143
20
votes
2
answers
11k
views
systemd on 15.04 won't log stdout of unit
I'm currently trying to make a systemd unit as a web server. Currently, my foo.service file looks as follows:
[Unit]
Description=The Foo Web Server
[Service]
Type=simple
ExecStart=/opt/foo/.cabal-...
- 607
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votes
1
answer
3k
views
How to copy the stdout of a command to the clipboard in a default Ubuntu installation?
I ran up against this question, and i found it quite interesting.
While researching for that, i found out that a solution had been posted already here on AskUbuntu, plus multiple times on ...
- 35.6k