Old boy Education-linux-pen question-1

2. Pen question-1

2.1 Create a new user, the password is 123456, and add it to the root group

Useradd user-g root && echo "123456" |passwd--stdin user

2.2 Displays the date and time of the current system

[[Email protected]/]# date +%f2016-08-25[[email protected]/]# date +%x10 16 minutes 25 seconds [[email protected]/]# date +%h:%m:%s10:1 7:45

2.3 How to view the Help file for command sort

Mans Sortsort--help

2.4 Split screen Show commands for/etc/services files

Less/etc/services

2.5 Viewing host routes

Route-nnetstat-r

2.6 Packaging and compressing/etc directory

Cd/tar zcf/tmp/etc.tar.gz./etc# authentication [[email protected]/]# ll-h/tmp/etc.tar.gz-rw-r--r--1 root root 9.3M 2016-08-25 10 : 07/tmp/etc.tar.gz[[email protected]/]# du-h/tmp/etc.tar.gz9.3m/tmp/etc.tar.gz

2.7 Restart the Samba service command

/etc/init.d/samba Restartservice Samba Restart

2.8 Viewing process status

There are 5 states of processes on Linux:

1. Running

2. Interrupt (in hibernation)

3. Non-disruptive

4. Zombie

5. Stop

PS Tool identifies 5 status codes for the process:

D non-interruptible uninterruptible sleep (usually IO)

R run runnable (on run queue)

S Interrupt Sleeping

T stop traced or stopped

Z Zombie a defunct ("zombie") process

[[email protected] ~]# ps aux |head -5    user         pid %cpu %mem    vsz   rss  TTY      STAT START   TIME COMMANDroot           1  0.0  0.1  19232   1516 ?        Ss   Aug24    0:01 /sbin/initroot          2  0.0   0.0      0     0 ?         S    Aug24   0:00 [kthreadd]root           3  0.0  0.0       0     0 ?        s    aug24    0:00 [migration/0]root          4  0.0   0.0      0     0 ?         S    AUG24   0:00 [KSOFTIRQD/0]

2.9 Set the new file permission to 600

chmod NewFile

2.10 Copy file/etc/group to user home directory, file name is unchanged

Cp-p/etc/group ~cp-a/etc/group ~-a-pdr-p same as--preserve=mode,ownership,timestamps-d same as--no-dere Ference--preserve=links-r Copy Directories recursively

2.11 Commands to restart the Linux server

Rebootinit 6shutdown-r Now

2.12 How to view processes that occupy 8080 ports

Lsof-i: 8080NETSTAT-TUNLP |grep 8080

2.13 How to change IP, host name, DNS

1. Modify IP and DNS

• Setup graphical tools

• Modify configuration File "/etc/sysconfig/network-scripts/ifcfg-eth0"

2. Modify Host Name

Hostname Host name # Temporary effective Vim/etc/sysconfig/network # permanent hostname= hostname

This article is from the "Chen was 007" blog, please be sure to keep this source http://chenfage.blog.51cto.com/8804946/1842322

Old boy Education-linux-pen question-1