As we know there’s a kind of read-only variables in bash in common linux system, typically $BASH_COMPLETION and $BASH_COMPLETION_DIR are both readonly variables. This post will focus on the following two topics, how can we set readonly variables in Bash, and how can we unset them. (function(d, [...]

In some sort of problems, ext3 goes read-only to protect the filesystem against further damages. What could cause such a readonly problem? It’s difficult to get an exact answer, but I’m inclined to take it as a file-system issue, though some hardware problems will trigger this error as well. (function(d, [...]