Linux的一些操作

Posted 2021-01-19

1.挂载镜像，使用本地的yum源

挂载iso镜像
/etc/yum.repos.d
touch CentOS-Media.repo

[c7-media]
name=CentOS-$releasever - Media
baseurl=file:///mnt/ #挂载的路径
gpgcheck=1
enabled=1 #启用这个yum源
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

yum clean all
yum makecache

yum list 查看

2.oracle建好库之后，需要创建用户

sqlplus /nolog
conn / as sysdba;
查看用户
select * from all_users;
create user linan identified by linan；
更改密码
alter user linan identified by linan 
授权dba用户
GRANT dba, connect, resource to linan;
授权普通用户
GRANT dba, connect, resource to linan;
commit;
conn username/password

3.jdk配置

jdk：
export JAVA_HOME=/usr/local/src/jdk1.7.0_79
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=$JAVA_HOME/lib
export PATH=$PATH:$JAVA_HOME/bin

4.限制tomcat使用的内存

JAVA_OPTS="-server -Xms800m -Xmx800m  -XX:PermSize=64M -XX:MaxNewSize=256m -XX:MaxPermSize=128m -Djava.awt.headless=true"