Linux basic concepts and Personal notes summary (2)

Security code: As long as kung fu deep, Mulberry becomes satin

Because the fourth chapter experiment must combine theory and practice, so I immediately demonstrate experimental results, and timely update, hope to help everyone, thank you!

Chapter III Installation and management procedures

1. Query the installed rpm software information

Format: rpm-q (sub-option) (software name)

-qa: View A list of all RPM packages installed on the system

-qi: View detailed information for the specified software

-QL: Query the list of directories and files installed by the specified package

-QC: Displays only the configuration files for the specified package installation

-QD: Displays only documentation files for the specified package installation

2. Which RPM software does the query file or directory belong to?

Format: RPM-QF file or directory name

3. Query the non-installed rpm package file information:

Format: RPM-QP (sub-option) RPM package software

-qpi: View details of the software through the. RPM Package file

-QPL: View the directory contained within the. RPM installation package, file list

-QPC: View the list of configuration files included in the. RPM Installation Package

-QPD: View the list of document files included in the. RPM Installation Package

4, CD-ROM mount

Mount/dev/cdrom (device)/media (directory)

Note: The habit of using discs with Windows is to be differentiated, and Linux must be mounted or uninstalled.

View Mount: Mount

Unmount of CD: Umount/dev/cdrom or Umount/media

5, RPM Package installation

RPM-IVH (sequence-insensitive) RPM package name

-I (install),-U (upgrade),-f (update),-V (Display information),-H (Show installation Progress, "#" representation)

6, RPM Package Uninstall:

RPM-E Package Name

--nodeps (Ignore dependency) 、--force (mandatory)

7. Maintain RPM Database

Rebuild RPM Database: rpm--REBUILDDB or RPM--INITDB

8, compile the installation process:

A, tar unpacking--Download the source code installation package file

Purpose: Unzip and release the source code package to the specified directory.

b, (./configure configuration)

Purpose: Set the installation directory, installation module and other options

c, make compile

Purpose: Generate executable binary files

D, make install installation

Purpose: Copy binary files to system, configure application environment

E, testing and use

Related commands: CP * Copy all Files

Source Package storage Location:/USR/SRC

Source Package Installation Location:/usr/local

Access to the Linux Web page plus port number (: 10000) to enter root and password access

Prevent conflicts, as shown in the notes:

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Fourth chapter account and authority Management

User management:

1, user-related configuration files

/ETC/PASSWD (save user)

/etc/shadow (user password file)

/etc/skel (user template file)

2, user-related commands

Useradd (create User), passwd (change password), Userdel (delete user), Usermod (Modify user properties)

Useradd options:

-D: Specify the user's host directory location

-e: Specify user account Expiration time

-G: Specify the user's base group name (or GID number)

-G: Specify the user's additional group name (or GID number)

-S: Specify the user's login shell

passwd (option) User name

-D: Delete password, root can be useful

-F: Forced execution

-K: Settings can be updated only after the password expiration expires

-L: Lock password

-U: Unlock Account

-S: Lists password-related information for ROOT to use

Usermod command:

Format: usermod (option) User name

Note: Usermod can be used to modify the user account settings

-L: Lock user account

-U: Unlocking user accounts

Because the options are roughly the same as those in the Useradd command, there is no explanation here

Chage-l User (view user account information)

Delete user account:

Userdel command

Format: Userdel (-r) User name

Add a point of knowledge here:! command can find the command line you need from the history record, history can get the serial number of the historical command

3, the management of the group

A, group-related configuration files:/etc/group

B, group-related commands: Groupadd-g (create Group), Groupdel (delete group), gpasswd (add user to Group)

GPASSWD command:

Format: GPASSWD (option) group account name

-A: Adding a user to a group

-D: Delete a user member from within a group

-M: Defines a list of group members, separated by commas (additional groups)

Add:

A, id command

Purpose: Query user identification (ID user name)

B, Groups command

Purpose: Query the group to which the user belongs

Groups user Name

C, Finger command

Finger User Name

D, users, W, who commands

Purpose: Query user information that has been logged on to the host

Prevent conflicts, as shown in the notes:

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Thank you for watching, I will immediately demonstrate the fourth chapter related experiments, timely update, in order to facilitate the combination of theoretical and experimental!

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Linux basic concepts and Personal notes summary (2)