I have change directory by <span style="background-color: rgb(0, 0, 0);"><font color="#ffffff">cd /usr/lib</font></span>. Then I have display all the files in this directory by <span style="background-color: rgb(0, 0, 0);"><font color="#ffffff">ls -all</font></span>. Now I want to save the result in a file. So I enter the command: <font color="#ffffff" style="background-color: rgb(0, 0, 0);">ls -all > filleinfo</font>. But it shows me that bash: fileinfo: Permission denied. If  I do the same in home directory, then it work fine, but when I change the directory it not work