Notes on shell and linux commands

• If you want to output all standard output and standard error to a file, use & to indicate all 1 and 2 information, eg:
  find /etc -name passwd &>find.all or find /etc -name passwd >find.all 2> &1

• find files that do not contain content
  find .-name'lsprocess.sh.*' | xargs grep -L'cap_dac_override,cap_dac_read_search,cap_sys_ptrace'