apt和snap
ubuntu用apt代替了apt-get，ubuntu的母公司Canonical在最新版的Ubuntu中用snap代替了apt。
类似于yum代替了rpm，而后又使用dnf代替了yum。
[Wed Mar 24 11:06 u20@u20-0-52 ~ ]$ snap help --all
The snap command lets you install, configure, refresh and remove snaps.
Snaps are packages that work across many different Linux distributions,
enabling secure delivery and operation of the latest apps and utilities.
Usage: snap <command> [<options>...]
Commands can be classified as follows:
Basics (basic snap management):
find Find packages to install
info Show detailed information about snaps
install Install snaps on the system
remove Remove snaps from the system
list List installed snaps
...more (slightly more advanced snap management):
refresh Refresh snaps in the system
revert Reverts the given snap to the previous state
switch Switches snap to a different channel
disable Disable a snap in the system
enable Enable a snap in the system
create-cohort Create cohort keys for a set of snaps
History (manage system change transactions):
changes List system changes
tasks List a change's tasks
abort Abort a pending change
watch Watch a change in progress
Daemons (manage services):
services Query the status of services
start Start services
stop Stop services
restart Restart services
logs Retrieve logs for services
Permissions (manage permissions):
connections List interface connections
interface Show details of snap interfaces
connect Connect a plug to a slot
disconnect Disconnect a plug from a slot
Configuration (system administration and configuration):
get Print configuration options
set Change configuration options
unset Remove configuration options
wait Wait for configuration
App Aliases (manage aliases):
alias Set up a manual alias
aliases List aliases in the system
unalias Remove a manual alias, or the aliases for an entire snap
prefer Enable aliases from a snap, disabling any conflicting aliases
Account (authentication to snapd and the snap store):
login Authenticate to snapd and the store
logout Log out of snapd and the store
whoami Show the email the user is logged in with
Snapshots (archives of snap data):
saved List currently stored snapshots
save Save a snapshot of the current data
check-snapshot Check a snapshot
restore Restore a snapshot
forget Delete a snapshot
export-snapshot Export a snapshot
import-snapshot Import a snapshot
Device (manage device):
model Get the active model for this device
reboot Reboot into selected system and mode
recovery List available recovery systems
Warnings (manage warnings):
warnings List warnings
okay Acknowledge warnings
Assertions (manage assertions):
known Show known assertions of the provided type
ack Add an assertion to the system
Introspection (introspection and debugging of snapd):
version Show version details
debug Run debug commands
Development (developer-oriented features):
download Download the given snap
pack Pack the given directory as a snap
run Run the given snap command
try Test an unpacked snap in the system
prepare-image Prepare a device image
For more information about a command, run 'snap help <command>'.
[Wed Mar 24 11:09 u20@u20-0-52 ~ ]$ apt --help
apt 2.0.2ubuntu0.2 (amd64)
Usage: apt [options] command
apt is a commandline package manager and provides commands for
searching and managing as well as querying information about packages.
It provides the same functionality as the specialized APT tools,
like apt-get and apt-cache, but enables options more suitable for
interactive use by default.
Most used commands:
list - list packages based on package names
search - search in package descriptions
show - show package details
install - install packages
reinstall - reinstall packages
remove - remove packages
autoremove - Remove automatically all unused packages
update - update list of available packages
upgrade - upgrade the system by installing/upgrading packages
full-upgrade - upgrade the system by removing/installing/upgrading packages
edit-sources - edit the source information file
satisfy - satisfy dependency strings
See apt(8) for more information about the available commands.
Configuration options and syntax is detailed in apt.conf(5).
Information about how to configure sources can be found in sources.list(5).
Package and version choices can be expressed via apt_preferences(5).
Security details are available in apt-secure(8).
