# apt-get remove collectd-core
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  cups-core-drivers cups-daemon cups-server-common hplip-data libart-2.0-2
  libcupscgi1 libcupsmime1 libgutenprint2 libhpmud0 libsane-hpaio
  python-pexpect python-renderpm python-reportlab python-reportlab-accel
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  collectd-core
0 upgraded, 0 newly installed, 1 to remove and 305 not upgraded.
After this operation, 3024 kB disk space will be freed.
Do you want to continue? [Y/n] Y
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LC_CTYPE = "UTF-8",
	LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
(Reading database ... 211391 files and directories currently installed.)
Removing collectd-core (5.4.0-3ubuntu2.2) ...
 * Stopping statistics collection and monitoring daemon collectd                                                                                  . . . . . . . . . . . . . . . .                                                                                                          [fail]
invoke-rc.d: initscript collectd, action "stop" failed.
dpkg: error processing package collectd-core (--remove):
 subprocess installed pre-removal script returned error exit status 1
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
 * Starting statistics collection and monitoring daemon collectd                                                                                 ERROR: lt_dlopen ("/usr/lib/collectd/rrdtool.so") failed: file not found. The most common cause for this problem are missing dependencies. Use ldd(1) to check the dependencies of the plugin / shared object.
                                                                                                                                          [ OK ]
Errors were encountered while processing:
 collectd-core
E: Sub-process /usr/bin/dpkg returned an error code (1)