Linux OPS Practice case-December 20, 2015-December 31 (first time)

First, the actual case (practice) content
If you study Linux, want to find a portion of Linux related operations, one day you received a company to give the invitation, you came to the company interview, before the interview, OPS supervisor gave you some simple pen questions, the title is as follows:

1, the creation of a 10G file system, the type of EXT4, requires the boot can be automatically mounted to a separate data/data directory;
Step A. # FDISK/DEV/SDA
Step b. Command:n
Step c. Command action:p (primary partition)
Step d. Partition Number:3
Step e. First Cylinder:default
Step f. Last Cylinder: +10g
Step g. Command:w
Step h. # partx-a/DEV/SDA
Step i. Cat/proc/partitions
Step J. Mkfs-t Ext4/dev/sda3
Step K. mount/dev/sda3/data/
Step L. Mount-l

2, display the ' Netstat-tan ' command results with ' LISTEN ' followed by 0, one or more blank characters end of the line;
Step: Netstat-tan | grep ' listen[[:blank:]]* '

3, add user Nginx, Zabbix, Tomcat, Nologin and Hadoop users (nologin user's shell is/sbin/nologin), and then find the/etc/passwd file in the same user name and shell name of the row;
Step A. AddUser Nginx; AddUser Zabbix; AddUser Tomcat; AddUser Hadoop; Adduser-s/sbin/nologin Nologin
Step b. # grep "\<\ ([[: alnum:]]\+\>\). *\1$"/etc/passwd

4, find a word in the/etc/rc.d/init.d/functions file (the middle of the word can be underlined) followed by a set of parentheses line;
Step: grep "[[: Alpha:]_]*\ (() \)"/etc/rc.d/init.d/functions

5, use echo to output a path, and then egrep find its path base name; Further use Egrep to remove its directory name (note that the directory name, not the directory path);
Step A. ECHO/ETC/RC.D/INIT.D | Egrep-o "[^/]+/?$"
Step b. ECHO/ETC/RC.D/INIT.D | Egrep-o "/.*/"

6. Find all files that are not root, bin or hadoop under the/usr directory;
Step: # find/usr-not-user root-a-not-user bin-a-not-user Hadoop

7, one day the system was invaded, hackers in your system to leave the Trojan file:
You now need to find all the files on the current system that are not owned by the master or group and have been visited in the last week;
In addition, it is necessary to find all files of more than 20k and type ordinary files in/etc directory;
Step A. # Find/-nouser-a-nogroup-a-atime-7
Step b. # find/etc-size +20k-a-type F

8, create the directory/test/data, let a group of ordinary users have write permissions to it, and all the files created by the group is the directory belongs to the group; In addition, each user can only delete their own files.
Step A. # mkdir-p/test/data
Step b. # chmod 3755/test/data;
Step c. ls-l/test = result drwx-t-sr-t

Linux OPS Practice case-December 20, 2015-December 31 (first time)