:: How to fix /etc/bashrc read only issue on CentOS + error permission denied # echo "alias ftp='/usr/bin/ftp'" >> /etc/bashrc -bash: /etc/bashrc: Permission denied # ls -l /etc/bashrc -rw-r--r-- 1 root root 1708 Sep 22 2009 /etc/bashrc + check and change attribute file # lsattr /etc/bashrc ----i-------- ...