马哥教育第四周作业

ls /etc/[^[:alpha:]][[:alpha:]]*

cp -a /etc/p*[^0-9] /tmp/mytest1

cat /etc/issue | tr "a-z" "A-Z" | tee /tmp/issue.out

用户管理命令
useradd -u uid -r -g groupname或gid -s shell路径 -d homedir
userdel -f/-h/-r username
usermod -a/-c/-d username
组管理命令
groupadd -f/-g groupname
groupdel groupmod 同上

 (1)  groupadd -g  2019 distro
 (2)  useradd -u 1005 mandriva -g distro
 (3)  useradd -u 1100 mageia -d /home/linux
 (4)  echo mageedu | passwd --stdin mageia
       passwd -x 7 mageia
 (5)  userdel  mandriva
 (6)  groupadd  peguin
        useradd slackware -u 2002 -g distro -G peguin
 (7)  usermod slackware -s /bin/tcsh
 (8)  groupadd admins
       useradd slackware3 -G admins