Linux Nineth Week

1. Write a script to determine whether the shell of all users on the current system is a login shell (that is, the user's shell is not/sbin/nologin), the number of these two types of users, and the string comparison;

#!/bin/bash

Awk-f: ' $NF ~ '/sbin/nologin ' {shell++} $NF!~ "/sbin/nologin" {noshell++} end{printf "Shell:%d \ t Noshell:%d \ n", Shell,nos Hell} '/etc/passwd

2. Write a script

(1) Obtain the host name of the current host and save it in the hostname variable;

(2) Determine if the value of this variable is localhost, and if so, modify the current hostname to www.magedu.com;

(3) Otherwise, the current host name is displayed;

3, write a script to complete the following functions

(1) Pass a disk device file path to the script to determine whether the device exists;

(2) If present, displays all the partition information on this device;

4, write a script to complete the following functions

The script can accept a parameter;

(1) If the parameter 1 is quit, the exit script is displayed, and the normal exit is performed;

(2) If the parameter 1 is yes, the execution script is displayed;

(3) Otherwise, the parameter 1 is any other value, performs an abnormal exit;

5, write a script to complete the following functions

Pass a parameter to the script, this parameter is one of gzip, bzip2 or XZ;

(1) If the value of parameter 1 is gzip, use the TAR and gzip archive to compress/etc directories into the/backups directory and name/backups/etc-20160613.tar.gz;

(2) If the value of parameter 1 is bzip2, use tar and bzip2 archive to compress/etc directory to/backups directory, and named/backups/etc-20160613.tar.bz2;

(3) If the value of parameter 1 is XZ, then the tar and XZ archives are used to compress/etc directories into the/backups directory and named/backups/etc-20160613.tar.xz;

(4) Any other value, the error compression tool is displayed, and an abnormal exit is performed;

6. Write a script that accepts a path parameter:

(1) If it is an ordinary document, it can be accessed normally;

(2) If it is a catalog file, then the CD command is available for it;

(3) If the file is a symbolic link, the description is a access path;

(4) Other is impossible to judge;

7, write a script, get the host name of the current host, judge

(1) If the hostname is empty or localhost, or "(none)", it is named mail.magedu.com;

(2) Otherwise, display the existing host name can be;

8, write a script, accept a user name as a parameter;

(1) If the user's ID number is 0, it is displayed as an administrator;

(2) If the user's ID number is greater than 0 and less than 500, it is displayed as a system user;

(3) Otherwise, it is displayed as a normal user;

10, write a script, pass a user name parameter to the script;

(1) If the user's ID number is greater than or equal to 500, and its default shell is a string ending in sh, the "a user can log system" is displayed. The string of the class;

(2) Otherwise, the display can not log on the system;

11. Write a script to complete the following tasks:

(1) Sequentially copy each direct file or subdirectory in the/var/log directory to the/TMP/TEST1-TESTN directory, respectively;

(2) The Cp-r command is used only when copying the directory;

(3) use CP command when copying files;

(4) Use the cp-d command when copying a linked file;

(5) All remaining types, using the CP-A command;

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Linux Nineth Week