A.passwd-ltest
B.passwd-utest
C.usermod-utest
D.faillog-utest
A.systemctldisablefirewalld
B.systemctldeclinefirewalld
C.systemctlrejectfirewalld
A.LS=‘ls-lh’
B.setcnet‘cd/etc/sysconfig/network-scripts/ifcfg-eth0’
C.aliasdie=‘rm-fr’
D.unaliasdie=‘rm-fr’