Shulou(Shulou.com)06/01 Report--

This article mainly introduces "linux daily command summary". In daily operation, I believe many people have doubts about the summary of linux daily commands. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "linux daily command summary". Next, please follow the editor to study!

Linux common commands and turn off the firewall

2. Linux common commands

Mkdir creation

Rm-rf deletion

Chmod-R 777 permissions

Mysql-uroot-r

Quit exit

Find /-name svn search location

3. Turn off the firewall and selinux

Redhat uses SELinux to enhance security by shutting it down by:

1. Permanently valid

Change the SELINUX= "" in the / etc/selinux/config file to disabled, and then restart.

two。 Effective immediately

Setenforce 0

The way to turn off the firewall is:

1. Permanent entry into force

Enable: chkconfig iptables on

Turn off: chkconfig iptables off

two。 Effective immediately and expire after restart

Enable: service iptables start

Turn off: service iptables stop

It should be noted that you can use the above command to enable and close other services under Linux.

Add:

a. The firewall also needs to turn off ipv6's firewall:

Chkconfig ip6tables off

And you can view the status with the following command:

Chkconfig-list iptables

B. selinux status can be viewed with the following command:

Sestatus

=

# uname-a # View kernel / operating system / CPU information

# head-n 1 / etc/issue # View operating system version

# cat / proc/cpuinfo # View CPU information

# hostname # View computer name

# lspci-tv # list all PCI devices

# lsusb-tv # list all USB devices

# lsmod # list the loaded kernel modules

# env # View environment variable resources

# free-m # View memory usage and swap area usage

# df-h # View the usage of each partition

# du-sh # View the size of the specified directory

# grep MemTotal / proc/meminfo # check the total memory

# grep MemFree / proc/meminfo # check the amount of free memory

# uptime # View system running time, number of users, and load

# cat / proc/loadavg # View system load disks and partitions

# mount | column-t # to view the status of attached partitions

# fdisk-l # View all partitions

# swapon-s # View all swap partitions

# hdparm-I / dev/hda # View disk parameters (for IDE devices only)

# dmesg | grep IDE # View the network detection status of IDE devices at startup

# ifconfig # View the properties of all network interfaces

# iptables-L # View firewall settings

# route-n # View the routing table

# netstat-lntp # View all listening ports

# netstat-antp # View all established connections

# netstat-s # process of viewing network statistics

# ps-ef # View all processes

# top # Real-time display of process status users

# w # View active users

# id # View specified user information

# last # View user login log

# cut-d:-F1 / etc/passwd # View all users of the system

# cut-d:-F1 / etc/group # View all groups of the system

# crontab-l # View the scheduled task service of the current user

# chkconfig-list # list all system services

# chkconfig-list | grep on # lists all started system service programs

# rpm-qa # View all installed packages

= =

Linux common commands and turn off the firewall

2. Linux common commands

Mkdir creation

Rm-rf deletion

Chmod-R 777 permissions

Mysql-uroot-r

Quit exit

Find /-name svn search location

3. Turn off the firewall and selinux

Redhat uses SELinux to enhance security by shutting it down by:

1. Permanently valid

Change the SELINUX= "" in the / etc/selinux/config file to disabled, and then restart.

two。 Effective immediately

Setenforce 0

The way to turn off the firewall is:

1. Permanent entry into force

Enable: chkconfig iptables on

Turn off: chkconfig iptables off

two。 Effective immediately and expire after restart

Enable: service iptables start

Turn off: service iptables stop

It should be noted that you can use the above command to enable and close other services under Linux.

Add:

a. The firewall also needs to turn off ipv6's firewall:

Chkconfig ip6tables off

And you can view the status with the following command:

Chkconfig-list iptables

B. selinux status can be viewed with the following command:

Sestatus

=

1.tar command tar-zcvf compressed file name. Tar.gz .gz is the name of the file you want to tar

1.tar czvf hcm20180809.tar hcm

Tar-xvf file.tar / / extract the tar package

Tar-xvf file.tar / / extract the tar package

Tar-xzvf file.tar.gz / / decompress tar.gz

Tar-xjvf file.tar.bz2 / / decompress tar.bz2

Tar-xZvf file.tar.Z / / decompress tar.Z

Unrar e file.rar / / decompress rar

Unzip file.zip / / decompress zip

Jar-xvf tbhcm_mobile-201803090849.war war package decompression

Zip-r filename.zip filesdir packaged zip

two。 Copy

Cp self20180821.tar.. / self change file

3. Remote replication from local to another machine

Upload the local directory to the specified directory on the remote machine

Scp-r / opt/soft/mongodb root@192.168.120.204:/opt/soft/scptest

Modify the file name to the directory

Mv "EmployeeTurnoverPO.class"EmployeeTurnoverPO.class20190514"

Directory authorization to a user chown-R oracle:oinstall bin

Add routes:

Route-n

Route add-net 192.168.40.0 netmask 255.255.255.0 gw 192.168.161.253

=

Set environment variabl

Vi / etc/profile

Export JAVA_HOME=/home/hr/jdk1.6.0_45

Export PATH=$JAVA_HOME/bin:$PATH

Export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

Export JRE_HOME=$JAVA_HOME/jre

Source / etc/profile

The character set is in effect temporarily:

Modify linux utf-8 character set export.UTF-8

At this point, the study of "linux Daily Command Summary" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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