Score:4

Ubuntu

Disable output of systemctl and apt-get

driver1848

5/1/23, 2:55 PM

I'm currently writing a script that installs and configures the Samba server automatically for me. I was wondering why this command sudo apt-get -y install samba > /dev/null && sudo systemctl enable smbd.service > /dev/null still gives this output.

Extracting templates from packages: 100%
Synchronizing state of smbd.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable smbd

How can I prevent the commands from giving any output?

Thanks

Ubuntu Server 20.04.3 LTS

124

0 + 0

server

apt

output

20.04

matigo

5/1/23, 3:02 PM

This is outside the scope of the question, but why would you *not* want to see the output of software being installed? This is a very simple way to see if there are problems before they become problems. Is the goal to have this script run on a fleet of systems to quietly start up Samba shares?

user.dz

5/1/23, 3:09 PM

Welcome to Ask Ubuntu. Does [this answer](https://askubuntu.com/a/1182696/26246) the question? seems related to stderr stream.

driver1848

5/1/23, 3:11 PM

@matigo No, I'm just planning to install Samba on a single local nas machine, but the parts haven't arrived yet and I wanted to learn a bit more about bash scripting because I was bored. And to why I don't want to see the output: To be honest, I don't know...

driver1848

5/1/23, 4:05 PM

@user.dz Not sure where this config file is or what command I'd need. But this would probably help me.

user.dz

5/1/23, 4:28 PM

@driver1848 try this `sudo apt-get -yy install samba 1> /dev/null 2> /dev/null && sudo systemctl enable smbd.service 1> /dev/null 2> /dev/null` (it redirects stderr too).

driver1848

5/1/23, 5:08 PM

Thank you, this fixed my issue!

Score:5

Ubuntu

user.dz

5/1/23, 5:49 PM

> will redirect only stdout. stderr stream should be redirected too. Same commands as below:

sudo apt-get -qq install samba 1> /dev/null 2> /dev/null && sudo systemctl enable smbd.service 1> /dev/null 2> /dev/null

apt-get..-qq will suppress more installation dialogs
1> /dev/null discards STDOUT
2> /dev/null discards STDERR

0 + 0

pasman pasmański

5/1/23, 6:53 PM

Option `apt-get -yy` is not documented in manual. In which version it is implemented ?

user.dz

5/1/23, 7:15 PM

@pasmanpasmański my mistake, It is `-qq`

Score:4

Ubuntu

pasman pasmański

5/1/23, 6:03 PM

If your script uses bash, then you should use the &> operator for redirecting any output, that is both stderr and stdout:

sudo apt-get -y install samba &>/dev/null \
&& sudo systemctl enable smbd.service &> /dev/null

0 + 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Disable output of systemctl and apt-get

TH: ปิดใช้งานเอาต์พุตของ systemctl และ apt-get

RO: Dezactivați ieșirea systemctl și apt-get

RU: Отключить вывод systemctl и apt-get

VI: Vô hiệu hóa đầu ra của systemctl và apt-get

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