What does 'script /dev/null' do?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}
Every time I log into a VM with root, su
into a user account, and try to use screen
it throws an error:
Cannot open your terminal '/dev/pts/0' - please check.
A Stack Overflow post said I needed to use script /dev/null
to fix it, and it works, but it still doesn't explain why I need to type script /dev/null
. I would like to understand what it does and why I need to type it.
terminal gnu-screen su pty
New contributor
add a comment |
Every time I log into a VM with root, su
into a user account, and try to use screen
it throws an error:
Cannot open your terminal '/dev/pts/0' - please check.
A Stack Overflow post said I needed to use script /dev/null
to fix it, and it works, but it still doesn't explain why I need to type script /dev/null
. I would like to understand what it does and why I need to type it.
terminal gnu-screen su pty
New contributor
1
> A Stack Overflow post said – it might be helpful if you also add a link to that post, maybe in a comment.
– törzsmókus
17 hours ago
add a comment |
Every time I log into a VM with root, su
into a user account, and try to use screen
it throws an error:
Cannot open your terminal '/dev/pts/0' - please check.
A Stack Overflow post said I needed to use script /dev/null
to fix it, and it works, but it still doesn't explain why I need to type script /dev/null
. I would like to understand what it does and why I need to type it.
terminal gnu-screen su pty
New contributor
Every time I log into a VM with root, su
into a user account, and try to use screen
it throws an error:
Cannot open your terminal '/dev/pts/0' - please check.
A Stack Overflow post said I needed to use script /dev/null
to fix it, and it works, but it still doesn't explain why I need to type script /dev/null
. I would like to understand what it does and why I need to type it.
terminal gnu-screen su pty
terminal gnu-screen su pty
New contributor
New contributor
edited 16 hours ago
törzsmókus
1156
1156
New contributor
asked yesterday
CJLCJL
1036
1036
New contributor
New contributor
1
> A Stack Overflow post said – it might be helpful if you also add a link to that post, maybe in a comment.
– törzsmókus
17 hours ago
add a comment |
1
> A Stack Overflow post said – it might be helpful if you also add a link to that post, maybe in a comment.
– törzsmókus
17 hours ago
1
1
> A Stack Overflow post said – it might be helpful if you also add a link to that post, maybe in a comment.
– törzsmókus
17 hours ago
> A Stack Overflow post said – it might be helpful if you also add a link to that post, maybe in a comment.
– törzsmókus
17 hours ago
add a comment |
1 Answer
1
active
oldest
votes
You cannot open /dev/pts/0
because it's owned by root, and after you su-ed into another user you're no longer able to open it via its path, but you're still able to use it via the opened handle to it, which was inherited from the parent process.
script /dev/null
will create another pty, owned by the current user.
Anyways, that bug/limitation seems to have been fixed in recent versions of screen
(eg. 4.99.0), which will correctly send the handle to the current terminal via the SCM_RIGHTS
ancillary message on a unix domain socket, instead of sending just the name of the terminal and have the screen
server try to open it (and fail). Same thing with tmux
.
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "106"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
CJL is a new contributor. Be nice, and check out our Code of Conduct.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f511267%2fwhat-does-script-dev-null-do%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You cannot open /dev/pts/0
because it's owned by root, and after you su-ed into another user you're no longer able to open it via its path, but you're still able to use it via the opened handle to it, which was inherited from the parent process.
script /dev/null
will create another pty, owned by the current user.
Anyways, that bug/limitation seems to have been fixed in recent versions of screen
(eg. 4.99.0), which will correctly send the handle to the current terminal via the SCM_RIGHTS
ancillary message on a unix domain socket, instead of sending just the name of the terminal and have the screen
server try to open it (and fail). Same thing with tmux
.
add a comment |
You cannot open /dev/pts/0
because it's owned by root, and after you su-ed into another user you're no longer able to open it via its path, but you're still able to use it via the opened handle to it, which was inherited from the parent process.
script /dev/null
will create another pty, owned by the current user.
Anyways, that bug/limitation seems to have been fixed in recent versions of screen
(eg. 4.99.0), which will correctly send the handle to the current terminal via the SCM_RIGHTS
ancillary message on a unix domain socket, instead of sending just the name of the terminal and have the screen
server try to open it (and fail). Same thing with tmux
.
add a comment |
You cannot open /dev/pts/0
because it's owned by root, and after you su-ed into another user you're no longer able to open it via its path, but you're still able to use it via the opened handle to it, which was inherited from the parent process.
script /dev/null
will create another pty, owned by the current user.
Anyways, that bug/limitation seems to have been fixed in recent versions of screen
(eg. 4.99.0), which will correctly send the handle to the current terminal via the SCM_RIGHTS
ancillary message on a unix domain socket, instead of sending just the name of the terminal and have the screen
server try to open it (and fail). Same thing with tmux
.
You cannot open /dev/pts/0
because it's owned by root, and after you su-ed into another user you're no longer able to open it via its path, but you're still able to use it via the opened handle to it, which was inherited from the parent process.
script /dev/null
will create another pty, owned by the current user.
Anyways, that bug/limitation seems to have been fixed in recent versions of screen
(eg. 4.99.0), which will correctly send the handle to the current terminal via the SCM_RIGHTS
ancillary message on a unix domain socket, instead of sending just the name of the terminal and have the screen
server try to open it (and fail). Same thing with tmux
.
edited yesterday
answered yesterday
mosvymosvy
9,40711034
9,40711034
add a comment |
add a comment |
CJL is a new contributor. Be nice, and check out our Code of Conduct.
CJL is a new contributor. Be nice, and check out our Code of Conduct.
CJL is a new contributor. Be nice, and check out our Code of Conduct.
CJL is a new contributor. Be nice, and check out our Code of Conduct.
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f511267%2fwhat-does-script-dev-null-do%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1
> A Stack Overflow post said – it might be helpful if you also add a link to that post, maybe in a comment.
– törzsmókus
17 hours ago