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

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;
 (1)FDISK/DEV/SDA
 (2)command:n
 (3)Command action:p (primary partition)
 (4)Partition Number:2 
 (5)First Cylinder:default
 (6)Last cylinder: +10g
 (7)command:w
 (8)partx-a/DEV/SDA
 (9)cat/proc/partitions
 (Ten)mkfs-t Ext4/dev/sda3
 ( One)mount/dev/sda3/data/
 ( A)mount-l

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

3, add user Nginx, Zabbix, Tomcat, Nologin and Hadoop user (Nologin user's shell is/sbin/nologin), then find out/etc/ A row in the passwd file that has the same user name as its shell name;
     (1)adduser nginx; adduser Zabbix; adduser Tomcat; AddUser Hadoop; adduser-s/sbin/nologin nologin
     (2)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;
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(1)directory name, not directory path);
    (1)echo/etc/rc.d/init.d | egrep-o "[^/]+/?$"
    (2)echo/etc/rc.d/init.d | egrep-o "/.*/"

6. Find all files that are not root, bin or hadoop under the/usr directory;
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;
    (1)Find/-nouser-a-nogroup-a-atime-7
    (2)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.
   (1)mkdir-p/test/data
   (2)chmod 3755/test/data;
   (3)ls-l/test = result Drwx-t-sr-t

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