linux foundation Exercise 2

1, description of the structure and the directory structure linux directory naming convention

linux directory structure / the total root directory. Down into secondary directory of all files and directories are in the root directory of this total

With the ls command to view the directories and files in linux, the specific parameters refer to man ls or ls - help viewing options

The secondary directory linux

Command / bin directory binary (binary) files, this directory is stored in the system binary files and executable binaries

/ Boot startup file directory. Will import / boot directory of files stored inside the computer to boot the system after system boot files are mostly start

Abbreviation / dev device (apparatus) stored hardware devices such as hard disk directory / dev / sda, u disk hardware devices such as an optical disk information

The system file / etc linux file system in the storage position, equivalent to the windows registry

/ Home directory in the user's home directory linux home

lib lib64 Linux common library package lib for the storage location 32

/ Media / mnt two directories used as a point to mount the hard disk and u

/ Proc file directory information storage memory

Binary command / sbin system administrator using / bin sbin as a soft link pointing to / sbin

/ Tmp file for storing the common

/ Var directory to store system information and error logs

Generated when / run linux operating system file location

/ Usr directory location of the system software to install the software

/ Opt is done by the system and you need to install other software applications

2, display / etc directory, all ending in .d file or directory

ls -d /etc/*.d ls -d parameter to select the directory plus if not default into subdirectories

Under View / etc / directory ending in .d files

3, the display / etc directory, all .conf end, and with m, n, r, p, at the beginning of the file or directory

ls -d /etc/[mnrp]*.conf

SUMMARY parentheses or brackets represent the relationship keep wildcard matching of alphanumeric symbols plus -d

End .conf, and with m, n, r, p, at the beginning of the file or directory

4, create / app / rootdir directory, and copy / root to all files within that directory, preserving permits required

The first step is to create a directory mkdir -p / app / rootdir with -p parameter to create a subdirectory of the parent directory is not created empty folder

The second part with the cp command to copy / root all the files to the directory cp -a recursively copy protection and leave property

5, to expand the function using the command line, create / tmp / a1, / tmp / a2, / tmp / a1 / a, / tmp / a1 / b, create a directory in / tmp: x_y, x_z, q_y, q_z

mkdir -p /tmp/{a1/{a,b},a2}/ dirk -p /tmp/{x/{y,z},q/{y,z}}

Renderings

6, summed user, user group management command and demonstrate command and common usage

User Group 4 profiles. The password information of the user information / etc / passwd password information / etc / gshadow group information / etc / group / group / etc / gshadow editing command can vim cat nano, may also be used groupmems

useradd Adds a user usermod modify user information userdel to delete user information, three belong to the user group information management commands groupadd to add groupmod modify group information management for the group groupdel

useradd -u create a user and assign uid -g specified group ID