why i could not find ulimit command in esehll mode but M-x ansi-term had not this problem. how could i fix it.
like this:
~ $ ulimit -c
ulimit: command not found
~ $
ulimit is a shell-builtin and not a binary. ansi-term uses your normal shell (bash, zsh, or whatever you are using) while eshell is a shell of its own, and it does not seem to implement ulimit.