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How to Switch User and Password in Linux
Linux is an open source operating system known for its robustness, security features, and flexibility. It offers a wide range of tools and functionalities for managing user accounts and passwords, including switching users and passwords. In this article, we will explore how to switch user and password in Linux.
1. Switching Users in Linux
Switching user in Linux allows you to log in to a different account on the same machine without logging out of your current account. This is useful when you want to access another user’s files, run a command as another user, or test the access levels of a particular user. There are two ways to switch user in Linux: using the su (substitute user) command or the sudo (superuser do) command.
Using the su Command
The su command allows you to switch to another user account by entering the desired username and password. You can use the su command to switch to any user account on the system, including the root user account, which has full administrative privileges.
To switch to another user account using the su command, open the terminal and type the following command:
su username
Replace “username” with the username of the account you want to switch to. You will be prompted to enter the password for that user account.
After entering the correct password, you will be logged in as the specified user. You can now perform tasks as that user, such as accessing files or running commands.
To switch back to your original account, simply type the exit command or press CTRL-D. This will terminate the current user session and return you to the previous user session.
Using the Sudo Command
The sudo command is another way to switch user in Linux, but it grants temporary administrative privileges to the user instead of completely changing to a different account.
To switch to another user account using the sudo command, open the terminal and type the following command:
sudo su username
Replace “username” with the username of the account you want to switch to. You will be prompted to enter the password for your current user account.
After entering the correct password, you will be granted temporary administrative privileges as the specified user. You can now perform tasks as that user, such as accessing files or running commands. When you are finished, simply type the exit command or press CTRL-D to terminate the current user session and return to your original account.
2. Changing Passwords in Linux
Changing your password periodically ensures the security of your Linux system. It is also advisable to change your password if you suspect that someone else has access to your account password. There are different tools and methods to change passwords in Linux, depending on the Linux distribution and the user account type.
Using the passwd Command
The passwd command is the most common tool for changing passwords in Linux. It allows a user to change their own password or the password of another user.
To change your own password using the passwd command, open the terminal and type the following command:
passwd
You will be prompted to enter your current password and then the new password twice. Note that Linux passwords are case-sensitive and should be at least eight characters long, including letters, numbers, and special characters.
To change another user’s password using the passwd command, open the terminal and type the following command:
sudo passwd username
Replace “username” with the username of the account whose password you want to change. You will be prompted to enter the password for your current user account and then the new password twice for the specified user.
Using the Usermod Command
The usermod command is another tool for changing passwords in Linux. It allows you to modify user account information, including resetting the password.
To reset a user’s password using the usermod command, open the terminal and type the following command:
sudo usermod –password “$(openssl passwd -1 newpassword)” username
Replace “newpassword” with the desired password and “username” with the username of the account whose password you want to change.
Conclusion
In this article, we have explored how to switch user and password in Linux using different tools and methods. Switching user in Linux allows you to log in to a different account on the same machine without logging out of your current account, while changing passwords ensures the security of your Linux system. By knowing how to switch user and password in Linux, you can maximize the benefits and flexibility of this powerful operating system.
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用戶名是：root
密碼是腔手畢：root
因?yàn)檫@是LINUX 安裝是默伍芹認(rèn)的（超級用薯脊戶）
虛擬機(jī)linux系統(tǒng)用戶名和密碼忘了怎么辦，有圖文病貓的嗎，我很笨的
你可以百度 單用戶模式進(jìn)入操作系統(tǒng)
修改root密碼
在使用linux時，可能會碰到root密碼忘記的情況，這時我們可以通過如下操作來重設(shè)root密碼，這種操作只能在本地機(jī)上來進(jìn)行，那些褲手派想試圖通過網(wǎng)絡(luò)來修改的就不要有非分之想了。
在服務(wù)器開機(jī)運(yùn)行到Grub畫面是，按E鍵進(jìn)入登陸選擇項，其中有三項：
root(hd0,0)
kernel /boot/vmlinuz-2.4.21-15 EL ro root=LABEL=/
initrd /initrd-2.4.21-15 EL.img
將光標(biāo)移到第二項，然后再次按E鍵，在出現(xiàn)的界面里面最下面一行是：
Grub edit > kernel /boot/vmlinuz-2.4.21-15.EL ro root=LABEL=/
在ro之前添加 single ，或者在這行后加薯散一個空格再輸入1，這兩個操作任何一個都可以即：
Grub edit > kernel /boot/vmlinuz-2.4.21-15.EL single ro root=LABEL=/
或者
Grub edit > kernel /boot/vmlinuz-2.4.21-15.EL ro root=LABEL=/ 1
然后按回車返回剛才的Grub登陸選擇界面，在第二項上按B鍵。即可直接進(jìn)入Linux命令行，然后鍵入 passwd root 即可修改root用戶的密碼。再reboot重新啟動計算機(jī)就可以了。
(一)Linux 系統(tǒng)密碼破解
1.在grub選項菜單按E進(jìn)入編輯模式
2.編輯kernel那行 /init 1 (或/single)
3.按B重啟
4.進(jìn)入后執(zhí)行下列命令
root@#passwd root (設(shè)置root的密碼)
Enter new unix password:輸入新的密碼
root@#init 6
(二)debian linux 系統(tǒng)密碼破解
1.在grub選項菜單\’Debian GNU/Linux,…(recovery mode)\’，按e進(jìn)入編輯模式
2.編輯kernel那行最后面的 ro single 改成 rw single init=/bin/bash，按b執(zhí)行重啟
3.進(jìn)入后執(zhí)行下列命令
root@(none)#mount -a
root@(none)#passwd root
root@(none)#reboot
(三)Freebsd 系統(tǒng)密碼破解
1.開機(jī)進(jìn)入引導(dǎo)菜單
2.選擇每項(按4)進(jìn)入單用戶模式
3.進(jìn)入之后輸入一列命令
root@#mount -a
root@#fsck -y
root@#passwd(修改密碼命令)
root@#root(要破解密碼的用戶名)
Enter new unix password:
root@#init 6 (重啟)
(四)Solaris 系統(tǒng)密碼破解
1.在grub選項菜中選擇solaris failasfe 項
2.系統(tǒng)提示Do you wish to have it mounted read-write on /a ? 選擇y
3.就進(jìn)入單用戶模式
4.輸入下列命令
#passwd
#New passwd:輸入新的密碼
#Re-enter New passwd:在次輸入新的密碼
#init 6 (重啟)
(五)NetBsd 系統(tǒng)密碼破解
1.開機(jī)：當(dāng)出現(xiàn)提示符號并開始倒數(shù)五秒時， 鍵入以下指令：
> boot -s (進(jìn)入單用戶模式命令)
2.在以下的提示符號中
Enter pathname of shell or RETURN for sh:
按下 Enter。
3.鍵入以下指令：
# mount -a
# fsck -y
4.使用 passwd 更改 root 的密碼。
5.使用 exit 指令進(jìn)入胡賀多人模式。
linux 跳出當(dāng)前用戶名和密碼的介紹就聊到這里吧，感謝你花時間閱讀本站內(nèi)容，更多關(guān)于linux 跳出當(dāng)前用戶名和密碼,如何在 Linux 中跳出當(dāng)前用戶名和密碼,怎么linux6.0裝好后要用戶名和密碼,虛擬機(jī)linux系統(tǒng)用戶名和密碼忘了怎么辦，有圖文病貓的嗎，我很笨的的信息別忘了在本站進(jìn)行查找喔。
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