Linux停快速清空文件的命令收集
Linux下快速清空文件的命令收集
> filename
echo > filename
echo '' > filename
echo "" > filename
cat /dev/null > filename
好多年以前就听老师讲过最后一种, 现在发现用前面的更加简单
1 楼
lynnlni
2011-06-22
/software/tomcat% cat file
123
/software/tomcat% > file
无效的空命令.
/software/tomcat% echo > file
/software/tomcat% cat file
/software/tomcat% echo " > file
不匹配".
/software/tomcat% cat /dev/null > file
/software/tomcat% cat file
/software/tomcat% echo $shell
/usr/bin/csh
/software/tomcat%
看过这些，你才知道老师为什么要这样教。
123
/software/tomcat% > file
无效的空命令.
/software/tomcat% echo > file
/software/tomcat% cat file
/software/tomcat% echo " > file
不匹配".
/software/tomcat% cat /dev/null > file
/software/tomcat% cat file
/software/tomcat% echo $shell
/usr/bin/csh
/software/tomcat%
看过这些，你才知道老师为什么要这样教。