3.1. 2018-01-02

3.1.1. 上节课回顾

3.1.2. 本节内容

systemd
/etc/systemd/system/
/lib/systemd/system/
sysv
/etc/init.d/

systemctl -l status httpd:

service name condrestart ==> systemctl try-restart name.service

systemctl resload-or-restart name.service
systemctl reload-or-try-restart name.service

systemctl mask(unmask) name.service

systemctl list-units -t service -a

systemctl daemon-reload

systemctl isolate graphical.target

systemctl resuce


Unit片段
Description
After
Before
Requires
Wants
Conflicts

保密性
完整性
可用性
可控制性
不可否认性

telnet ip 25
helo a.com
mail from:god@heaven.com
rcpt to:root
data
subject: hello
I miss you
.
quit


md5sum --check f1.sh f1.sh.md5

gpg -c f1.sh
gpg -d f1.sh.gpg