میشه بگید هر کدوم از این سرویس های زیر چی کار میکنه ؟ میخوام اونایی رو که لازم نیستن غیر فعال کنم
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1-acpid: Perform intelligent power management of your system
2-atd: Enables scheduling of jobs
3-avahi-daemon: Discover services and hosts on a local network
4-cron: Runs system housekeeping chores on specified dates/times
5-dbus: Delivers messages between applications
6-gdm: GNOME Display Manager
7-hal: A layer for hardware support and detection
8-pulseaudio: New generation audio server
9-apmd: Monitors battery status for some older laptops
10-bootlogd: Saves messages at boot to a log file
11-rsync: Fast remote file copy progr
12-acpi-support: For laptops, does power management and enables hotkeys
13-anacron: Runs system housekeeping chores on specified days
14-hotkey-setup: Auto-configures laptop hotkeys
15-laptop-mode: Auto-enables laptop mode when running on batteries
16-policykit: Framework for managing administrative privileges
17-stop-bootlogd: Stops saving boot messages to a log file
18-usplash: User bootsplash utility
19-cups: Common UNIX Printing System(tm) - server
20-dkms_autoinstaller: Dynamic Kernel Module Support Framework
21-system-tools-backends: System Tools to manage computer configuration -- scripts
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