I am creating the file copy tool using python across the nodes as passwordless.
While doing that, I encountered a banner message output also in scp command along with a progress bar. I want to suppress the banner message and show only the progress bar.
The command used:
scp -q <file_name> username#server:path
The -q option should do the trick. The man page specify the q option to be used for the use cases.
-q' Quiet mode: disables the progress meter as well as warning and diagnostic messages from ssh(1).
Can you share the exact command/code and the output which you are getting?
Related
I try to have separate ssp modes during connection using Bluetooth btmgmt utility. Basic idea is scan current device OUI and select ssp on/off modes. But I can't get any answer from neither btmgmt con or btmgmt info commands when I put them into .service files. My system is Arch Linux arm 32-bit and bluez stack version is 5.55-1. I tried
[Unit]
Description=check Bluetooth address
[Service]
Type=oneshot
ExecStart=/usr/bin/bash -c '/usr/bin/btmgmt info >> /usr/local/lib/mac 2>&1'
without any success: it just puts nothing in output file. Some tricks like add
User=root
Group=root
or substitute ExecStart with
ExecStart=/bin/bash -c 'echo -e "$(btmgmt con)" >> /usr/local/lib/mac 2>&1
did nothing. I tried changed thing by putting btmgmt stuff in different bash script instead of start them right from service file, i.e.
ExecStart=/usr/local/lib/test1
to no avail. I'm confused completely, because of:
It doesn't seem to be general btmgmt thing problem, because I can set ssp mode from service files
in very simple manner, just using
ExecStart=btmgmt off
or
ExecStart=btmgmt off
even without full path.
It doesn't seem to be redirecting command error as well, because if I add
ExecStartPre=/usr/bin/bash -c '/usr/bin/fdisk -l > /usr/local/lib/mac 2>&1'
it does work without any problem and I see fdisk info in file (I use fdisk because it requires elevated rights same as btmgmt one).
Moreover, btmgmt info works in the same way, i.e. shows nothing in out file. It makes me think something is wrong in output of btmgmt. I talk about output because input parameters work fine in btmgmt ssp on/of commands and journalctl and systemct don't show any errors in btmgmt con/info cases, so it seems to like output generating successfully but then sending somewhere to outer space, but I'm not sure completely.
Thanks for any help in advance
Well, I make a statement: btmgmt is quite intended to be used for output at any manner, but they tried make a zillion variants of output which directed to exact result it should be: bug is buried somewhere deep inside of bt_shell_printf and struct data. I'm not ready run through all that disgusting documented code (I mean total absence of comments or more-or-less satisfactory mans), so I ended up with a liitte bit hacked version of utility downgraded to simple fprintf in output, leaving only commands I need: con, ssp, power and simplified until only current setting printing info. Everything works fine, and I can use that kind of btmgmt not with systemd only, but even with udev rules (indirectly, of course)
I know this is an old question, but I had the same problem, and managed to fix it after hours and hours of trying.
I don't know why in the world this happens to be so hard with btmgmt but here's the fix:
[Unit]
After=bluetooth.service
Description=Bluetooth service
[Service]
ExecStart=<your-process>
Group=root
StandardInput=tty
TTYPath=/dev/tty2
TTYReset=yes
TTYVHangup=yes
Type=simple
User=root
Basically, by occupying a TTY, btmgmt will think it's running in an interactive terminal, and will output as usual.
Hope this saves anyone the hell I've been through!
I have the problem that I want to enable logging of a screen session at the start of it which then saves the log to a specific file.
What I have until now was:
screen -AmdSL cod2war /home/cod2server/scripts/service_28969.sh
while service_28969.sh is a shell script that will call other scripts which produce output.
I started multiple of those screen-sessions with different names, for example
screen -AmdSL cod2sd /home/cod2server/scripts/service_28962.sh
-L enables logging as the screen's man say, and will safe the ouput in a file called 'screenlog.0', now since I have multiple of those screens only one of it produces output saved in that log file (I can't find other 'screenlog.*' files in that folder).
I thought to use the -Logfile "file" option from the same man page, but it doesn't work for me and I can't find out what I'm doing wrong..
screen -Logfile cod2sd.log -AmdS cod2sd /home/u268450/cod2server/scripts/service_28962.sh
will produce the following error:
Use: screen [-opts] [cmd [args]]
or: screen -r [host.tty]
Options:
[...]
Error: Unknown option Logfile
and
screen -AmdS cod2sd /home/u268450/cod2server/scripts/service_28962.sh -Logfile cod2sd.log
will run without any error and start the screen but without the logging at all..
You can specify a logfile from within the default startup ~/.screenrc file using a line like
logfile mylog.log
To do this from the command line you can create a file mystartup to hold the above line, then use option -c mystartup to tell screen to read this file for setup instead of the default. If you also need to have ~/.screenrc read, you can add the source command to your startup file. The final result would look something like:
echo 'logfile mylog.log
source ~/.screenrc' >mystartup
screen -AmdSL cod2war -c mystartup /home/cod2server/scripts/service_28969.sh
This works for me:
screen -L -Logfile /Logs/Screen/`date +%Y%m%d`_screen.log
The configs I checked:
screen version 4.08.00 (GNU) 05-Feb-20 on FreeBSD 12.2
and
version 4.06.02 (GNU) 23-Oct-17 on Debian GNU/Linux 10 (buster)
and
version 4.00.03 (FAU) 23-Oct-06 on Mac OS X 10.9.5.
I just ran into this error myself and found this solution that worked with my python file, wanted to share for anyone else who might run into this issue:
screen -L -Logfile LOGFILENAME.LOG -dmS SCREENNAME python3 ./FILENAME.PY
I have no idea if this is the 'correct' way but it works.
-L enables logging
-Logfile LOGFILENAME.LOG declares what to call the log file and file format
-dmS SCREENNAME, dm runs in detached mode and S allows you to name the session
python3 ./FILENAME.PY in this case is my script but I assume that any other script here functions
I have tried a different ordering of these commands and this was the only way I managed to have them all run without issues. Hopes this helps.
I recently saw that ChromeOS added the functionality to do split screen windows in tablet mode in the most recent dev releases. So I put my Chromebook R11 in dev mode for the first time and updated to version 62.
The flag is one of the many on this list https://peter.sh/experiments/chromium-command-line-switches/
The only resources for actually executing these switches was http://www.chromium.org/for-testers/command-line-flags
So I tried following the steps. I went to the crosh shell with Ctrl-Alt-T. Then I typed "shell". Then "sudo su". Then I tried to modify with "sudo vim /etc/chrome_dev.conf", but it was readonly so it didn't save.
So I visited here www dot chromium dot org/chromium-os/poking-around-your-chrome-os-device and followed the steps to making changes to the filesystem and disabling rootfs verification. But the command it told me to enter just gave me an error: "make_dev_ssd.sh: ERROR: IMAGE /dev/mmcblk0 IS NOT MODIFIED."
I'm running out of ideas and resources here..
make_dev_ssd.sh is how you disable rootfs verification and modify files in the rootfs. If that's not working, that might be a bug in that script that should be reported & fixed upstream (e.g. https://crbug.com/new).
That said, are you sure you need to pass a command line flag ? Look at chrome://flags and see if the feature you want to access is available there. Many command line flag is also available on that page.
Try this:
sudo su
cp /etc/chrome_dev.conf /usr/local/
mount --bind /usr/local/chrome_dev.conf /etc/chrome_dev.conf
echo "--arc-availability=officially-supported " >> /etc/chrome_dev.conf
There is no documentation that I can find beyond the oneliner provided by the command-line utility. It says:
-batch force batch I/O
So what's going on here if I pass it a query or multiple queries?
When the sqlite3 shell is run interactively, it shows a startup message and the sqlite> prompt, and (on Windows) tries to converts the input to UTF-8.
If the automatic console detection does not work as intended, it can be overridden with -batch or -interactive.
My .screenrc has some initialization code that opens some windows. It's neat.
What I want to do, while running screen is simply , with one command open a new screen window that is running a program.
It SHOULD be:
screen -t 'CADMIN' sudo cherokee-admin -b
This actually works, except that it also runs my .screenrc and opens up all of my
windows in a nested screen. FAIL.
I know I could use
^c ( to create a new window )
^cA ( to title it )
sudo cherokee-admin -b
and get the same effect, but I'd like to bring a little elegance to my life, which
is why I use screen and not some multi terminal thing.
Ideas?
Ok, I've got a somewhat palatable answer:
from the bugs page there is a discussion about problems using the screen -t invocation.
I've tried this and I find that screen -c /dev/null -t CADMIN sudo cherokee-admin -b actually works the way I originally thought it would. It's kind of nifty actually, -c calls nothing for the value of .screenrc, which does not open my glorious screen rig. I can live with this.
You could setup another .screenrc file that doesn't have all of the other windows in it then in your .bash_profile you could add something like:
alias scn="screen -c '.screenrc2' -t 'CADMIN' sudo cherokee-admin -b"
then all you would have to do is run $scn from the cli to open screen with the desired effect.
hope this helps
edit: Make sure you name the second .screenrc file something different (i.e. '.screenrc2')