CentOS下如何避免文件覆盖?linux如何覆盖文件

[root@stu227he]#touchhe.txt

[root@stu227he]#set-onoclobber

[root@stu227he]#echo"123">he.txt

bash:he.txt:cannotoverwriteexistingfile

如果要取消限制，就把set-o改为set+o

[root@stu227he]#set+onoclobber

[root@stu227he]#echo"123">he.txt

[root@stu227he]#cathe.txt

123