I have a headless Ubuntu server. I ran a command on the server (snapraid sync) over SSH from my Mac. The command said it would take about 6 hrs, so I left it over night.
When I came down this morning, the Terminal on the Mac said: «Write failed: broken pipe»
I’m not sure if the command executed fully. Is this a timeout issue? If so, how can I keep the SSH connection alive overnight?
asked Nov 5, 2012 at 8:31
Garry PettetGarry Pettet
8,05622 gold badges65 silver badges103 bronze badges
4
This should resolve the problem for Mac osX version: 10.8.2
add:
ServerAliveInterval 120
TCPKeepAlive no
to this file:
~/.ssh/config
Or, if you want it to be a global change in the SSH client, to this file
/private/etc/ssh_config
«ServerAliveInterval 120» basically says to «ping» the server with a NULL packet every 120s, and «TCPKeepAlive no» means to not set the SO_KEEPALIVE socket option (since you shouldn’t need it with ServerAliveInterval already set, and apparently it’s «spoofable» or some odd).
The servers similarly have something they could set for the same effect (ClientKeepAliveInterval) but typically you don’t have control over those settings as much.
answered Feb 19, 2013 at 16:22
3
You can use «screen» util for that. Just connect to the server over SSH, start screen session by «screen» command execution, start your command there and disconnect (don’t exit screen session). When you think your command already done you can connect to the server and attach to your screen session where you can see the command execution result/progress (in case one should be).
See «man screen» for more details.
answered Sep 25, 2013 at 18:25
humkinshumkins
9,54711 gold badges57 silver badges74 bronze badges
3
This should resolve the problem for ubuntu and linux mint
add:
ServerAliveInterval 120
TCPKeepAlive yes
to
/etc/ssh/ssh_config file
answered Mar 21, 2016 at 10:09
Instead of screen I’d recommend tmux, an (arguably) better competitor to screen
tmux new-session -s {name}
That command creates a session. Any time after that you want to connect:
tmux a -t {name}
answered Dec 27, 2014 at 14:41
jmvbxxjmvbxx
9763 gold badges13 silver badges21 bronze badges
there are two solutions
- To update server and restart server sshd
echo "ClientAliveInterval 60" | sudo tee -a /etc/ssh/sshd_config
- To update client
echo "ServerAliveInterval 60" >> ~/.ssh/config
answered Apr 28, 2015 at 16:39
XuanyuXuanyu
6015 silver badges11 bronze badges
After having tried to change many of above parameters in sshd_config (ClientAliveInterval, ClientMaxCount,TCPKeepAlive…) nothing had changed. I have spend hours and days to look for a solution on forums and blogs…
It appears that the problem of broken pipe which forbids to connect with ssh/sftp came from permissions settings on ChrootDirectory.
the ChrootDirectory has to be owned by root/root with 755 permision
lower permissions 765/766/775… won’t work but strongers do (eg 700)
if you need to give a write permission to connected user, you can give it in sub-directories.
if chroot is owned by sftpUser:sftpGroup, it won’t work neither…
chroot-> root:root 755
|
---subdirectories-> sftpUser:sftpGroup 700 up to 770
hope it would help
answered Dec 4, 2018 at 9:32
DavidDavid
4828 silver badges17 bronze badges
If you’re still having problem after editing /etc/ssh/sshd_config or if ~/.ssh/config
simply does not exist on your machine then I highly recommend reinstalling ssh. This solution took about a minute to fig both «Broken pipe» errors and «closed by remote host» errors.
sudo apt-get purge openssh-server
sudo apt update
sudo apt install openssh-server
answered Jan 15, 2019 at 6:38
2
jeremyforan’s answer is correct, however I’ve found that if you are trying to use scp it is necessary to explicitly point it to a config file configured as described, it seems to not obey the normal hierarchy of config. For example:
scp -F ~/.ssh/config myfile joe@myserver.com:~
works, while omitting the -F still results in the broken pipe error.
answered Jun 29, 2015 at 19:12
Ubuntu :
ssh -o ServerAliveInterval=5 -o ServerAliveCountMax=1 user@x.x.x.x
answered Feb 21, 2019 at 8:57
0
I use an ASUS router with two internet input lines. I appoint my IP to a certain line, and it works.
answered Apr 14, 2018 at 17:45
Description
Mikhail Efremov
2013-06-20 17:40:04 MSK
-bash: echo: ошибка записи: Обрыв канала Это из-за /etc/profile.d/infinality-settings.sh: if [ "$SET_XFT_SETTINGS" = "true" ]; then echo "$XFT_SETTINGS" | xrdb -merge >/dev/null 2>&1 fi потому как xrdb: Can't open display '' Можно проверять DISPLAY или просто if [ "$SET_XFT_SETTINGS" = "true" ]; then echo "$XFT_SETTINGS" | xrdb -merge fi >/dev/null 2>&1 Впрочем, возможно использование xrdb в /etc/profile.d/ - это вообще зря, не место ли этому всему где-нибудь в /etc/X11/xinit.d/?
Comment 1
Repository Robot
2013-06-24 21:33:07 MSK
libfreetype-infinality-2.4.12-alt2 -> sisyphus: * Mon Jun 24 2013 Dmitry V. Levin <ldv@altlinux> 2.4.12-alt2 - infinality-settings.sh: relocated from /etc/profile.d/ to /etc/X11/profile.d/ (closes: #29093). - Reintroduced ld.so.conf.d based configuration (closes: #29095).
I am running Ubuntu 14.04.3, it’s uptodate. I don’t know why, for a few days I began to take grep: write error: Broken pipe message on launching gnome-terminal . It seems to be harmless but it bothers me. How can I debug it?
EDIT: I moved aliases and functions each to separate files such as .bash_aliases and .bash_functions and added a command to load them from .bashrc
if [ -f ~/.bash_aliases ]; then
. ~/.bash_aliases
fi
if [ -f ~/.bash_functions ]; then
. ~/.bash_functions
fi
If I don’t load .bash_functions problem disappears.
I am trying to find the faulty one by disabling each function one by one.
This one gives me the same error but when I disable it I keep getting the same error, so I may have more faulty functions.
ls -lt $PWD| grep ^d | head -1 | cut -b 51-
grep: development
write error: Broken pipe
I wonder why I begin to take that error.
EDIT2:
I found a similar problem here boken pipe
The root of the problem also seems similar.
I tried the given test command in the link which have the same error:
bash -c '(while echo foo; do :; done); echo status=$? >&2' | head
foo
foo
foo
foo
foo
foo
foo
foo
foo
foo
bash: line 0: echo: write error: Broken pipe
status=0
EDIT3:
Though that unbuffer workaround I posted below as an answer to my own question works, I am not satisfied with it, but my knowledge about debugging is limited. Acoording to this link https://lists.gnu.org/archive/html/bug-coreutils/2007-11/msg00080.html it stems from SIGPIPE trap by another task, and this link https://lists.gnu.org/archive/html/bug-coreutils/2007-11/msg00154.html pinpoints the exact cause of the problem, it’s one of the pam authentication module which I am in trouble with it recently.
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Тема: mplayer, grep, awk, notify-send — как их подружить? (Прочитано 1055 раз)
0 Пользователей и 1 Гость просматривают эту тему.
Блуждающая девственница
Задача: Слушать интернет-радио через mplayer и выводить в notify-send имя исполнителя и название песни.
Как я слушаю и что пытался сделать:
mplayer -ao alsa http://radio.spark-media.ru:8000/nashe | grep "StreamTitle=" | awk --field-separator="=" '{print $2}' | notify-send -i dialog-informationНе работает. Почему-то или grep дальше не отдает или awk не берет, до notify-send вывод вообще не доходит.
Вопрос, как заставить сие играть и выводить в notify-send первым аргументом имя исполнителя, а вторым название песни?
Просто mplayer выводит:
ICY Info: StreamTitle='Пикник - Фиолетово-Чёрный';
Vovans
дело тут вовсе не в грепе или авк, а в notify-send как минимум. Вот попробуй ему скормить нужное:
echo "Пикник - Фиолетово-Чёрный" | notify-send
No summary specified.
bash: echo: ошибка записи: Обрыв канала
оно принимает только так: `notify-send «Пикник — Фиолетово-Чёрный»` 
—
о линукс по-русски: ссылка вырезана
—
ссылки — в профиль, в поле url
— kwah
« Последнее редактирование: 24 Августа 2009, 15:12:15 от Kwah »
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