68 lines
1.0 KiB
Markdown
68 lines
1.0 KiB
Markdown
# linux管道流之多行输入
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### cat<< EOF
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```shell
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cat<< EOF
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>菜单大全：
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>青椒炒肉丝
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>凉拌黄瓜
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>铁锅炖大鹅
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EOF
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```
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### cat<<- EOF
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```shell
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#忽略前导制表符。
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cat<<- EOF
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>菜单大全：
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>青椒炒肉丝
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>凉拌黄瓜
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>铁锅炖大鹅
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EOF
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```
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### cat>>/etc/rc.local<< EOF
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```shell
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cat>>/etc/rc.local<< EOF #说明：这里的EOF没有加单引号，则shell默认会解析特殊字符，如遇$符号解析变量值
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>菜单大全：
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>青椒炒肉丝
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>凉拌黄瓜
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>我家：$PATH #这里将被解析成环境变量PATH的值
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EOF
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```
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```shell
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cat>>/etc/profile<< 'EOF' #用单引号括起来
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>$JAVA_HMOE=/usr/local/java
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>PATH=$JAVA_HMOE/bin:$PATH
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>export PATH
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EOF #最后这个EOF不需要加单引号，否则shell将识别不了结束符
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```
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```shell
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cat<< 'EOF' >>/etc/profile #把EOF放在前面
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>$JAVA_HMOE=/usr/local/java
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>PATH=$JAVA_HMOE/bin:$PATH
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>export PATH
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EOF #最后这个EOF不需要加单引号，否则shell将识别不了结束符
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```
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