Marco 2016 new Linux+python high-end operation third week homework answer

                      Marco 2016 new Linux+python high-end OPS third week assignment                                           1, lists the user names of all logged-in users on the current system, note that the same user logs on multiple times, only once.     [[email protected] ~]# who | awk  ' {print $1 $ NF} ' | uniq -d    [[email protected] ~]# who     yicx     :0            2016-08-22 20:27  (: 0)     root     pts/0         2016-08-22 20:27  (192.168.102.149) 2, remove information about the user who last logged in to the current system.     [[email protected] ~]# lastlog | grep -v  "Never"      user name              Ports       from                Last Login Time     root              pts/1                       a  8 month  22 20:21:58 +0800 2016    yicx              pts/2                       a  8 month  22 20:21:40 +0800  20163, remove the shell that is the user's default shell on the current system.     [[email protected] ~]# cut -d: -f7 /etc/passwd | uniq -c | sort -n -u -r -k1 | head -1 |      awk  ' {print  $NF} '     /sbin/nologin         [[email protected] ~]# cut -d: -f7 /etc/passwd  | uniq -c | sort -n -u -r -k1 | head -1      35 /sbin/nologin    [[email protected] ~]# 4, will The third field in/etc/passw d  has the largest number of the 10 user's information changed to uppercase and saved to the/tmp/maxusers.txt file.     [[email protected] ~]# sort -t: -k3 -n /etc/passwd  |tail -10 > /tmp/maxusers.txt    [[email protected] ~]#  cat /tmp/maxusers.txt    libstoragemgmt:x:992:990:daemon account for  libstoragemgmt:/var/run/lsm:/sbin/nologin  &nBsp; saslauth:x:993:76:saslauthd user:/run/saslauthd:/sbin/nologin    geoclue:x : 994:991:user for geoclue:/var/lib/geoclue:/sbin/nologin    colord:x:995:993: user for colord:/var/lib/colord:/sbin/nologin    unbound:x:996:994:unbound  dns resolver:/etc/unbound:/sbin/nologin    polkitd:x:997:996:user for  Polkitd:/:/sbin/nologin    systemd-network:x:998:997:systemd network management :/:/sbin/nologin    systemd-bus-proxy:x:999:998:systemd bus proxy:/:/sbin/ Nologin    yicx:x:1000:1000:yicx:/home/yicx:/bin/bash    nfsnobody:x : 65534:65534:anonymous nfs user:/var/lib/nfs:/sbin/nologin5, take out the IP address of the current host, and tip: Slice the results of the ifconfig command.     [[email protected] ~]# ifconfig| grep  ' inet '           inet 192.168.102.183  netmask 255.255.255.0  broadcast 192.168.102.255         inet6 fe80::20c:29ff:fe36:e77f  prefixlen  64  scopeid 0x20<link>        inet 127.0.0.1   netmask 255.0.0.0        inet6 ::1   prefixlen 128  scopeid 0x10

Marco 2016 new Linux+python high-end operation third week homework answer