Personal summary of some commonly used Linux commands

Sort out some Linux commands commonly used in work

Linux shutdown

    shutdown -h now

restart the Linux server

shutdown -r now

output information (such as display java_home)

echo $JAVA_HOME

display java process details

ps aux|grep java

weblogic background start service, and save log information Go to nohup.out in the same directory

nohup ./startWebLogic.sh &

print file information in real time (usually used to view log information)

tail -f nohup.out

uses zip compression to compress all files in the current directory

zip -r . /a.zip ./*View

port information

netstat -lnp | grep 4999

zip compress the specified directory file

zip -r filename.zip file1 file2 file3 /usr/work/school

Unzip the zip file to the specified directory

unzip -n wls1036_dev.zip -d /opt/program_file/wls1036

Compress the specified directory file in tar format

tar -zcvf 20150908_com_bf01.tar.gz com

tar file decompression

tar -xzvf fileName.tar.gz

delete all files in the folder and subdirectories

rm -rf /var/log/httpd/access

decompress the rar compressed file to the specified directory (requires to install rar for linux first)

unrar e catalina.rar / usr/work/zip/102/rartest

kill the process with the specified pid

kill -9 10444

check the firewall status

/etc/init.d/iptables status

close the firewall

/etc/init.d/iptables stop

Linux server A copy server B File

scp root@[B's ip address or host name]: [file path stored on B] / file [file path stored on A]

scp [email protected]:/home/oracle/test.sql /home/oracle

With the specified port
scp -P 8889 [email protected]:/workspace/ZSB_NEW_domain/zsbCode_20160225_bf01.tar.gz /workspace/zsb_domain

Linux server A copies the folder on server B

scp -r root@[B's ip address or hostname ]: [file path stored on B] [file path stored on A]

scp -r [email protected]:/test /test

Install rpm files (such as jdk)

rpm -ivh linuxqq-v1.0.2-beta1.i386.rpm

Modify file read permissions

chown -R asns.asns SQBService

file vi operation

:w save file without exiting vi
:w file additionally save changes to file without exiting vi
:w! force save without exiting vi
:wq save file and exit vi
:wq! force save file and exit vi
:q Do not save the file, quit vi
:q! Do not save the file, force quit vi
:e! Abandon all modifications, start from the last save file and edit
i Unlock and enter


curl to simulate Http's get or post request under Linux


```
First, get Request

curl "http://www.baidu.com" If the URL here points to a file or a picture, it can be downloaded directly to the local

curl -i "http://www.baidu.com" Display all information

curl -l "http://www.baidu.com" only display header information

curl -v "http://www.baidu.com" shows the whole process of get request analysis

wget "http://www.baidu.com" can also be
```



```
Second, post request

curl -d "param1= value1¶m2=value2" "http://www.baidu.com"
```


file authorization

    chmod 777 spaceplus_deploy.sh
   
remote copy file scp

    scp [email protected]:/data/home/nickzhang/spaceplus-boss-prod.war /data/webapp
   
to view all process information

    netstat -atlnp

to check whether the ssh service is installed

rpm -qa |grep ssh

If the SSH package is not installed, you can install it through yum or rpm installation package

yum install ssh

to start the ssh service

service sshd start
/etc /init.d/sshd start

configuration\View SSHD port

View   or edit the SSH service configuration file, such as vi /etc/ssh/sshd.config
If you want to modify the port, you can change the default port 22 behind the port to another port (note that the # sign in front should be removed).

Remote connection to SSH4

If you need to connect to SSH remotely, you need to open port 22 on the firewall.
.Turn off the firewall, or set an exception for port 22