Different outputs for `w`, `who`, `whoami` and `id`2019 Community Moderator ElectionWhy `journalctl...
If I can solve Sudoku, can I solve the Travelling Salesman Problem (TSP)? If so, how?
How could an airship be repaired midflight?
PTIJ: Who should I vote for? (21st Knesset Edition)
Happy pi day, everyone!
Are all passive ability checks floors for active ability checks?
Did Ender ever learn that he killed Stilson and/or Bonzo?
Have the tides ever turned twice on any open problem?
How to deal with taxi scam when on vacation?
Is it normal that my co-workers at a fitness company criticize my food choices?
Are ETF trackers fundamentally better than individual stocks?
Why does a Star of David appear at a rally with Francisco Franco?
Meme-controlled people
Can I use USB data pins as a power source?
Is it good practice to use Linear Least-Squares with SMA?
Bach's Toccata and Fugue in D minor breaks the "no parallel octaves" rule?
When to use a slotted vs. solid turner?
ERC721: How to get the owned tokens of an address
Knife as defense against stray dogs
Why Choose Less Effective Armour Types?
Non-trivial topology where only open sets are closed
What are substitutions for coconut in curry?
Why do newer 737s use two different styles of split winglets?
Is honey really a supersaturated solution? Does heating to un-crystalize redissolve it or melt it?
Professor being mistaken for a grad student
Different outputs for `w`, `who`, `whoami` and `id`
2019 Community Moderator ElectionWhy `journalctl --list-boots` doesn't match what `uptime` and `who -b` report?Is it necessary for a login-shell to create utmp entry?Is `who mom likes` a real linux command?Difference between who and whoami commandsHow to get rsync to complain if user not found$USER != whoamiWhat is the difference between **pts** and **tty** and **:0**?who shows (unknown) user logged-in: what's going on?who, whoami, and “who am i”id and whoami commands shows different userwho and w report my user ten times..but I have only four pts openUID and GID showing root
In command line platforms online, like for instance the one on Codecademy, when I run
for cmd in w who whoami id
do
echo $cmd
$cmd
echo =========================
echo " "
done
I get
w
00:52:54 up 8 days, 14:10, 0 users, load average: 3.78, 2.98, 2.69
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
=========================
who
=========================
whoami
ccuser
=========================
id
uid=1000(ccuser) gid=1000(ccuser) groups=1000(ccuser)
=========================
Note that only whoami and id output something. When I run the same thing on my computer, I see similar results for all commands.
Why doesn't Codecademy display the user for w and who? What's different about these commands?
users who w whoami
asked 1 hour ago
whoamiwhoami
61
New contributor
whoami is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
In command line platforms online, like for instance the one on Codecademy, when I run
for cmd in w who whoami id
do
echo $cmd
$cmd
echo =========================
echo " "
done
I get
w
00:52:54 up 8 days, 14:10, 0 users, load average: 3.78, 2.98, 2.69
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
=========================
who
=========================
whoami
ccuser
=========================
id
uid=1000(ccuser) gid=1000(ccuser) groups=1000(ccuser)
=========================
Note that only whoami and id output something. When I run the same thing on my computer, I see similar results for all commands.
Why doesn't Codecademy display the user for w and who? What's different about these commands?
users who w whoami
asked 1 hour ago
whoamiwhoami
61
New contributor
whoami is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
In command line platforms online, like for instance the one on Codecademy, when I run
for cmd in w who whoami id
do
echo $cmd
$cmd
echo =========================
echo " "
done
I get
w
00:52:54 up 8 days, 14:10, 0 users, load average: 3.78, 2.98, 2.69
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
=========================
who
=========================
whoami
ccuser
=========================
id
uid=1000(ccuser) gid=1000(ccuser) groups=1000(ccuser)
=========================
Note that only whoami and id output something. When I run the same thing on my computer, I see similar results for all commands.
Why doesn't Codecademy display the user for w and who? What's different about these commands?
users who w whoami
asked 1 hour ago
whoamiwhoami
61
New contributor
whoami is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
In command line platforms online, like for instance the one on Codecademy, when I run
for cmd in w who whoami id
do
echo $cmd
$cmd
echo =========================
echo " "
done
I get
w
00:52:54 up 8 days, 14:10, 0 users, load average: 3.78, 2.98, 2.69
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
=========================
who
=========================
whoami
ccuser
=========================
id
uid=1000(ccuser) gid=1000(ccuser) groups=1000(ccuser)
=========================
Note that only whoami and id output something. When I run the same thing on my computer, I see similar results for all commands.
Why doesn't Codecademy display the user for w and who? What's different about these commands?
users who w whoami
users who w whoami
asked 1 hour ago
whoamiwhoami
61
New contributor
whoami is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
whoamiwhoami
61
New contributor
whoami is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
whoamiwhoami
61
New contributor
whoami is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
whoamiwhoami
61
asked 1 hour ago
whoamiwhoami
61
61
New contributor
whoami is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
whoami is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
whoami is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
idreports
- the current credentials of its own process; or
- the credentials of a named user, as read out of the system account database.
whoamireports the current credentials of its own process.
whoandwreport the active login sessions table from the login database.
BSD doco notes that whoami does a subset of the job of id, and that id renders it obsolete.
A system does not have to have an active login sessions table. On Linux operating systems and on the BSDs, if the table has not been created at bootstrap, or has been deleted since, the system will operate without one. Logging in and out does not implicitly create it on Linux operating systems, moreover.
Furthermore, the table need not be readable by unprivileged users and neither the who nor the w command will report this as an error.
Further reading
- Jonathan de Boyne Pollard (2018). The Unix login database. Frequently Given Answers.
- Jonathan de Boyne Pollard (2018). "login-update-utmpx". User Commands. nosh toolset.
- Lennart Poettering et al. (2018).
systemd-update-utmp.service. systemd manual pages. Freedesktop.org. - Is it necessary for a login-shell to create utmp entry?
- https://unix.stackexchange.com/a/409036/5132
answered 59 mins ago
JdeBPJdeBP
36.9k475176
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
});
}
});
whoami 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%2f506757%2fdifferent-outputs-for-w-who-whoami-and-id%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
idreports
- the current credentials of its own process; or
- the credentials of a named user, as read out of the system account database.
whoamireports the current credentials of its own process.
whoandwreport the active login sessions table from the login database.
BSD doco notes that whoami does a subset of the job of id, and that id renders it obsolete.
A system does not have to have an active login sessions table. On Linux operating systems and on the BSDs, if the table has not been created at bootstrap, or has been deleted since, the system will operate without one. Logging in and out does not implicitly create it on Linux operating systems, moreover.
Furthermore, the table need not be readable by unprivileged users and neither the who nor the w command will report this as an error.
Further reading
- Jonathan de Boyne Pollard (2018). The Unix login database. Frequently Given Answers.
- Jonathan de Boyne Pollard (2018). "login-update-utmpx". User Commands. nosh toolset.
- Lennart Poettering et al. (2018).
systemd-update-utmp.service. systemd manual pages. Freedesktop.org. - Is it necessary for a login-shell to create utmp entry?
- https://unix.stackexchange.com/a/409036/5132
answered 59 mins ago
JdeBPJdeBP
36.9k475176
add a comment |
idreports
- the current credentials of its own process; or
- the credentials of a named user, as read out of the system account database.
whoamireports the current credentials of its own process.
whoandwreport the active login sessions table from the login database.
BSD doco notes that whoami does a subset of the job of id, and that id renders it obsolete.
A system does not have to have an active login sessions table. On Linux operating systems and on the BSDs, if the table has not been created at bootstrap, or has been deleted since, the system will operate without one. Logging in and out does not implicitly create it on Linux operating systems, moreover.
Furthermore, the table need not be readable by unprivileged users and neither the who nor the w command will report this as an error.
Further reading
- Jonathan de Boyne Pollard (2018). The Unix login database. Frequently Given Answers.
- Jonathan de Boyne Pollard (2018). "login-update-utmpx". User Commands. nosh toolset.
- Lennart Poettering et al. (2018).
systemd-update-utmp.service. systemd manual pages. Freedesktop.org. - Is it necessary for a login-shell to create utmp entry?
- https://unix.stackexchange.com/a/409036/5132
answered 59 mins ago
JdeBPJdeBP
36.9k475176
add a comment |
idreports
- the current credentials of its own process; or
- the credentials of a named user, as read out of the system account database.
whoamireports the current credentials of its own process.
whoandwreport the active login sessions table from the login database.
BSD doco notes that whoami does a subset of the job of id, and that id renders it obsolete.
A system does not have to have an active login sessions table. On Linux operating systems and on the BSDs, if the table has not been created at bootstrap, or has been deleted since, the system will operate without one. Logging in and out does not implicitly create it on Linux operating systems, moreover.
Furthermore, the table need not be readable by unprivileged users and neither the who nor the w command will report this as an error.
Further reading
- Jonathan de Boyne Pollard (2018). The Unix login database. Frequently Given Answers.
- Jonathan de Boyne Pollard (2018). "login-update-utmpx". User Commands. nosh toolset.
- Lennart Poettering et al. (2018).
systemd-update-utmp.service. systemd manual pages. Freedesktop.org. - Is it necessary for a login-shell to create utmp entry?
- https://unix.stackexchange.com/a/409036/5132
answered 59 mins ago
JdeBPJdeBP
36.9k475176
idreports
- the current credentials of its own process; or
- the credentials of a named user, as read out of the system account database.
whoamireports the current credentials of its own process.
whoandwreport the active login sessions table from the login database.
BSD doco notes that whoami does a subset of the job of id, and that id renders it obsolete.
A system does not have to have an active login sessions table. On Linux operating systems and on the BSDs, if the table has not been created at bootstrap, or has been deleted since, the system will operate without one. Logging in and out does not implicitly create it on Linux operating systems, moreover.
Furthermore, the table need not be readable by unprivileged users and neither the who nor the w command will report this as an error.
Further reading
- Jonathan de Boyne Pollard (2018). The Unix login database. Frequently Given Answers.
- Jonathan de Boyne Pollard (2018). "login-update-utmpx". User Commands. nosh toolset.
- Lennart Poettering et al. (2018).
systemd-update-utmp.service. systemd manual pages. Freedesktop.org. - Is it necessary for a login-shell to create utmp entry?
- https://unix.stackexchange.com/a/409036/5132
answered 59 mins ago
JdeBPJdeBP
36.9k475176
edited 26 mins ago
answered 59 mins ago
JdeBPJdeBP
36.9k475176
answered 59 mins ago
JdeBPJdeBP
36.9k475176
answered 59 mins ago
JdeBPJdeBP
36.9k475176
36.9k475176
add a comment |
add a comment |
whoami is a new contributor. Be nice, and check out our Code of Conduct.
whoami is a new contributor. Be nice, and check out our Code of Conduct.
whoami is a new contributor. Be nice, and check out our Code of Conduct.
whoami 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%2f506757%2fdifferent-outputs-for-w-who-whoami-and-id%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
