最近在学习shell脚本，就仿照网上的例子，写了一个简单的安装oracle前，要创建用户修改参数的一个脚本。

#!/bin/bash

if [ ! $1 ] || [ ! $2 ]

then

echo "execute error,please input sid and oracle basic home path"

exit

fi

#yum install -y binutils* compat-libstdc++* elfutils-libelf* elfutils-libelf-devel* elfutils-libelf-devel-static* gcc* gcc-c++* glibc* glibc-common* glibc-devel* glibc-headers* kernel-headers* ksh* libaio* libaio-devel* libgcc* libgomp* libstdc++* libstdc++-devel* make* numactl-devel* sysstat* unixODBC* openmotif* compat-lib* compat-gcc*

/usr/sbin/groupadd -g 500 oinstall

/usr/sbin/groupadd -g 501 dba

/usr/sbin/useradd -g oinstall -G dba oracle

echo oracle | passwd oracle --stdin

mkdir -p $2

mkdir -p $2/app/oracle

chown -R oracle:oinstall $2

chown -R oracle:oinstall $2/app/oracle

chmod -R 775 $2

cat > /home/oracle/.bash_profile <

export PATH=$PATH:$HOME/bin

export TMP=/tmp

export TMPDIR=$TMP

export ORACLE_BASE=$2/app/oracle

export ORACLE_HOME=$2/app/oracle/product/11.2.0

export ORACLE_SID=$1

export ORACLE_TERM=xterm

export PATH=$ORACLE_HOME/bin:/usr/sbin:$PATH

export LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib

export CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib

export NLS_DATE_FORMAT="yyyy-mm-dd HH24:MI:SS"

EOF

cat >> /etc/security/limits.conf <

oracle soft nproc 2047

oracle hard nproc 16384

oracle soft nofile 1024

oracle hard nofile 65536

EOF

echo "session required pam_limits.so ">> /etc/pam.d/login

cat >> /etc/profile <

if [ $USER = "oracle" ]; then

if [ $SHELL = "/bin/ksh" ]; then

ulimit -p 16384

ulimit -n 65536

else

ulimit -u 16384 -n 65536

fi

fi

EOF

cat >>/etc/sysctl.conf <

fs.aio-max-nr = 1048576

fs.file-max = 6815744

kernel.shmall = 2097152

kernel.shmmax = 4294967295

kernel.shmmni = 4096

kernel.sem = 250 32000 100 128

net.ipv4.ip_local_port_range = 9000 65500

net.core.rmem_default = 262144

net.core.rmem_max = 4194304

net.core.wmem_default = 262144

net.core.wmem_max = 1048586

EOF

sysctl -p

运行脚本的时候 记得给文件运行权限，还要带参数 第一个SID ,第二个是安装的根路径。