終端sudo命令

⑴ ubuntu開機執行sudo

bashrc文件中按你原來的命令改寫。
udo chown usrname -R /dev/kvm //原命令echo password | sudo -S chown usrname -R /dev/kvm //改寫。註：這里password是密碼，參數-S專門為執行sudo命令的時候要輸入密碼而准備的，表示標准輸入。當然這種方法是極不好的，直接把密碼寫入了 .bashrc 文件中。而且雖然不用輸入密碼，但是每次終端會有輸出符的殘留。
需要開機執行的sudo命令可以寫在/etc/rc.local中，因為/etc/rc.local是以root身份去執行的。系統在啟動時會先調用/etc/init.d/rc.local，在/etc/init.d/rc.local腳本中再調用/etc/rc.local。可見，首先要必須先保證/etc/rc.local對root具有可執行許可權。通過sudo chmod u+x /etc/rc.local後，即可往/etc/rc.local中添加sudo命令實現開機自動執行了、

⑵ sudo rm -rf /*是什麼意思

是遞歸刪除根分區，就是刪除所有文件，包括操作系統的本身。

sudo是linux系統管理指令，是允許系統管理員讓普通用戶執行一些或者全部的root命令的一個工具；如halt，reboot，su，它不僅減少了root用戶的登陸和管理時間，同樣也提高了安全性，這個命令的作用是調用root的許可權去執行一些高級別許可權的命令。

sudo可使一般用戶不需要知道超級用戶的密碼即可獲得許可權。將普通用戶的名字、可以執行的特定命令、按照哪種用戶或用戶組的身份執行等信息，登記在特殊的文件中（通常是/etc/sudoers），即完成對該用戶的授權（此時該用戶稱為「sudoer」）。

在一般用戶需要取得特殊許可權時，其可在命令前加上「sudo」，將會詢問該用戶自己的密碼（以確認終端機前的是該用戶本人），回答後系統，即會將該命令的進程以超級用戶的許可權運行。之後的一段時間內，使用sudo不需要再次輸入密碼。

以上資料參考：網路——rm

⑶ 求助在終端中輸入sudo

產生問題的原因是你調整了分區，導致分區號改變，grub無法找到引導配置文件就會出現rescue。輸入set root那些就是告訴grub去哪找到內核文件引導進入系統。 其實，你說的easybcd引導（實際就是windows的引導）菜單沒丟失，只要你能選擇引導windows，這個菜單就會出現。所以你現在可以有兩個選擇： 1、用grub引導雙系統，grub rescue後輸入命令進入Ubuntu後，終端運行sudo update-grub就可以了，會自動配置引導雙系統。如果運行結束看提示沒有找到windows，先安裝os-prober再update-grub。 2、在完成上面的grub修復後，重啟進PE用分區軟體重建mbr，恢復默認的windows系統引導，重啟就會出現你所說的easybcd的引導菜單了，選擇ubuntu看看能不能進入，如果不行，需要進win然後運行easybcd刪除原來的ubuntu啟動項，重新再添加新的ubuntu引導項。

⑷ Mac OS X 10.11 sudo 指令出問題了么

終端輸入sudo -s 再輸密碼

OSXElCapitan中，在內核下引入了Rootless機制，以下路徑：/System/bin/sbin/usr(except/usr/local)均屬於Rootless范圍，即使root用戶無法對此目錄有寫和執行許可權，只有Apple以及Apple授權簽名的軟體（包括命令行工具）可以修改此目錄。要麼思考你這個操作的意義之後，使用其他方式完成你的操作比如你要改vim的配置，請放在~/.vim/中，而不是/usr/share這種全局路徑要麼關閉Rootless（非開發者一般不推薦，或者建議執行後再次開啟）附關閉方法：重啟，開機按住Command+R，以Recovery分區啟動，然後選擇以下方式：圖形化操作在SecurityConfiguration中關閉命令行操作csrutildisable

⑸ Ubuntu中實行終端命令sudo apt install tree無法定位軟體包是什麼意思

tree軟體的下載源沒找到。
1、嘗試使用sudo apt-get update更新新源列表
2、之後再次執行sudo apt-get install tree

⑹ 普通用戶怎麼切換sudo指令 sudo指令又怎麼切換普通用戶指令

在普通用戶下，打開終端輸入sudo passwd root，然後會提示你輸入密碼，這個是普通用戶的密碼，然後還有兩次密碼是輸入root的新密碼，一次輸入一次是確認的，輸入完成後root就開通了，然後注銷重新切換用戶登錄到root用戶就好了，登錄界面會出現你的普通用戶和other user，選擇other user然後輸入root和密碼就好了。

⑺ 如何打開android命令行終端

1、連接電腦上，用adb打開，android命令行終端即可。

(7)終端sudo命令擴展閱讀：

終端命令sudo: Executing Commands with Elevated Privileges 執行命令特權 sudo是允許系統管理員讓普通用戶執行一些或者全部的root命令的一個工具，如halt，reboot，su等等。這樣不僅減少了root用戶的登陸 和管理時間，同樣也提高了安全性。Sudo不是對shell的一個代替，它是面向每個命令的。

app_0是用戶名，也就是終端在系統中的名字。android是主機名/ 表示當前路徑。

這些信息存儲在變數PS1中，自己可以改變。改成彩色更加美觀，而且輸入命令後更加容易找到提示符。有一個重要的基本變數是PATH，這叫命令搜索路徑。

⑻ 【Mac】使用sudo命令時提示：command not found

在mac終端上使用sudo命令時，提示command not found。

最開始網路的一個方式，說是修改/etc/sudoers文件， 參考鏈接 ，可是我發現我根本打不開這個文件。

於是又開始探索另一個方法，不直接使用sudo，而是用 su root。

⑼ Linux操作系統下Sudo命令的使用方法

sudo命令格式如下：

sudo -K | -L | -V | -h | -k | -l | -vsudo [-HPSb] [-a auth_type] [-c
class|-] [-p prompt] [-u username|#uid] {-e file [...] | -i | -s | command}

下面我們再來看一下sudo其它常用的一些參數：

選項 含義 作用
sudo -h Help 列出使用方法，退出。
sudo -V Version 顯示版本信息，並退出。
sudo -l List 列出當前用戶可以執行的命令。只有在sudoers里的用戶才能使用該選項。
sudo -u username|#uid User 以指定用戶的身份執行命令。後面的用戶是除root以外的，可以是用戶名，也可以是#uid。

sudo -k Kill 清除「入場卷」上的時間，下次再使用sudo時要再輸入密碼。

sudo -K Sure kill 與-k類似，但是它還要撕毀「入場卷」，也就是刪除時間戳文件。

sudo -b command Background 在後台執行指定的命令。
sudo -p prompt command Prompt 可以更改詢問密碼的提示語，其中%u會代換為使用者帳號名稱，%h會顯示主機名稱。非常人性化的設計。
sudo -e file Edit 不是執行命令，而是修改文件，相當於命令sudoedit

⑽ Linux操作系統下Sudo命令的使用方法

建議：
在Linux系統下，右鍵打開終端後，可以輸入"man sudo"或者"info sudo"查詢，因為使用方法實在是太多，可以摘要如下，其他可以自己查看。
NAME
sudo, sudoedit - execute a command as another user

SYNOPSIS
sudo -h | -K | -k | -L | -l | -V | -v

sudo [-bEHPS] [-p prompt] [-u username|#uid] [VAR=value]
{-i | -s | command}

sudoedit [-S] [-p prompt] [-u username|#uid] file ...

OPTIONS
sudo accepts the following command line options:

-b The -b (background) option tells sudo to run the given command in
the background. Note that if you use the -b option you cannot use
shell job control to manipulate the process.

-E The -E (preserve environment) option will override the env_reset
option in sudoers(5)). It is only available when either the
matching command has the SETENV tag or the setenv option is set in
sudoers(5).

-e The -e (edit) option indicates that, instead of running a command,
the user wishes to edit one or more files. In lieu of a command,
the string "sudoedit" is used when consulting the sudoers file. If
the user is authorized by sudoers the following steps are taken:

1. Temporary copies are made of the files to be edited with the
owner set to the invoking user.

2. The editor specified by the VISUAL or EDITOR environment vari-
ables is run to edit the temporary files. If neither VISUAL
nor EDITOR are set, the program listed in the editor sudoers
variable is used.

3. If they have been modified, the temporary files are copied back
to their original location and the temporary versions are
removed.

If the specified file does not exist, it will be created. Note
that unlike most commands run by sudo, the editor is run with the
invoking user's environment unmodified. If, for some reason, sudo
is unable to update a file with its edited version, the user will
receive a warning and the edited will remain in a temporary
file.

-H The -H (HOME) option sets the HOME environment variable to the
homedir of the target user (root by default) as specified in
passwd(5). By default, sudo does not modify HOME (see set_home and
always_set_home in sudoers(5)).

-h The -h (help) option causes sudo to print a usage message and exit.

-i The -i (simulate initial login) option runs the shell specified in
the passwd(5) entry of the user that the command is being run as.
The command name argument given to the shell begins with a '-' to
tell the shell to run as a login shell. sudo attempts to change to
that user's home directory before running the shell. It also ini-
tializes the environment, leaving TERM unchanged, setting HOME,
SHELL, USER, LOGNAME, and PATH, and unsetting all other environment
variables. Note that because the shell to use is determined before
the sudoers file is parsed, a runas_default setting in sudoers will
specify the user to run the shell as but will not affect which
shell is actually run.

-K The -K (sure kill) option is like -k except that it removes the
user's timestamp entirely. Like -k, this option does not require a
password.

-k The -k (kill) option to sudo invalidates the user's timestamp by
setting the time on it to the Epoch. The next time sudo is run a
password will be required. This option does not require a password
and was added to allow a user to revoke sudo permissions from a
.logout file.

-L The -L (list defaults) option will list out the parameters that may
be set in a Defaults line along with a short description for each.
This option is useful in conjunction with grep(1).

-l The -l (list) option will list out the allowed (and forbidden) com-
mands for the invoking user on the current host.

-P The -P (preserve group vector) option causes sudo to preserve the
invoking user's group vector unaltered. By default, sudo will ini-
tialize the group vector to the list of groups the target user is
in. The real and effective group IDs, however, are still set to
match the target user.

-p The -p (prompt) option allows you to override the default password
prompt and use a custom one. The following percent ('%') escapes
are supported:

%H expanded to the local hostname including the domain name (on if
the machine's hostname is fully qualified or the fqdn sudoers
option is set)

%h expanded to the local hostname without the domain name

%p expanded to the user whose password is being asked for
(respects the rootpw, targetpw and runaspw flags in sudoers)

%U expanded to the login name of the user the command will be run
as (defaults to root)

%u expanded to the invoking user's login name

%% two consecutive % characters are collapsed into a single %
character

-S The -S (stdin) option causes sudo to read the password from the
standard input instead of the terminal device.

-s The -s (shell) option runs the shell specified by the SHELL envi-
ronment variable if it is set or the shell as specified in
passwd(5).

-u The -u (user) option causes sudo to run the specified command as a
user other than root. To specify a uid instead of a username, use
#uid. When running commands as a uid, many shells require that the
'#' be escaped with a backslash ('\'). Note that if the targetpw
Defaults option is set (see sudoers(5)) it is not possible to run
commands with a uid not listed in the password database.
-V The -V (version) option causes sudo to print the version number and
exit. If the invoking user is already root the -V option will
print out a list of the defaults sudo was compiled with as well as
the machine's local network addresses.

-v If given the -v (validate) option, sudo will update the user's
timestamp, prompting for the user's password if necessary. This
extends the sudo timeout for another 5 minutes (or whatever the
timeout is set to in sudoers) but does not run a command.

-- The -- flag indicates that sudo should stop processing command line
arguments. It is most useful in conjunction with the -s flag.

Environment variables to be set for the command may also be passed on
the command line in the form of VAR=value, e.g.
LD_LIBRARY_PATH=/usr/local/pkg/lib. Variables passed on the command
line are subject to the same restrictions as normal environment vari-
ables with one important exception. If the setenv option is set in
sudoers, the command to be run has the SETENV tag set or the command
matched is ALL, the user may set variables that would overwise be for-
bidden. See sudoers(5) for more information.