linux写环境变量对字符转义

  以前在配置oracle环境换了或者jdk环境,用脚本初始化配置,发现$JAVA_HOME被真实路径取代,这不操蛋吗,今天无心间发现echo  -e能够转义特殊字符数据库

得之兴业,岁在今朝!bash

  • 对oracle帐户下oaclle单实例数据库变量的设置

#!/bin/bash
echo export ORACLE_BASE=/u01/app/oracle >>.bash_profile  
echo -e "export ORACLE_HOME=\$ORACLE_BASE/product/12c" >>.bash_profile //echo -e 对特殊字符转义 \$ 写入到文件 $
echo export ORACLE_SID=oracle12c >>.bash_profile
echo -e "PATH=\$PATH:$HOME/bin:\$ORACLE_HOME/bin:\$ORACLE_HOME/lib:\$ORACLE_HOME/lib64" >>.bash_profile
echo -e "LD_LIBRARY_PATH=\$ORACLE_HOME/bin:/usr/bin" >>.bash_profile
echo export NLS_LANG="AMERICAN_AMERICA.ZHS16GBK" >>.bash_profile

source ~/.bash_profile   //刷新用户环境变量
  •  官方对echo解释

ECHO(1)                          User Commands                         ECHO(1)

NAME
       echo - display a line of text

SYNOPSIS
       echo [SHORT-OPTION]... [STRING]...
       echo LONG-OPTION

DESCRIPTION
       Echo the STRING(s) to standard output.

       -n     do not output the trailing newline   //不换行

 -e enable interpretation of backslash escapes //容许转义字符 
  •   Linux直接转义特殊字符

#!/bin/bash #desc init jdk env cat >> ~/.bash_profile<<EOF export ABC=/tmp export abc=\$ABC/123 EOF //结果
[root@lab-120 ~]# cat .bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs export PATH=$PATH:$HOME/bin export ABC=/tmp export abc=$ABC/123
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