Shell Scripting Exercises

1, 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;

#!/bin/bash## finddev.sh# pass a disk device file path to the script to determine if this device exists # If present, displays all partition information on this device if [$#-ge 1];then for dev in [email protected] ;d o If [-B $dev];then fdisk-l $dev else errdev= $errdev "" $dev fi Done [[$ (Echo $errdev | WC-C)-GT 1]] && echo-e "\n============ The following devices do not exist ==============\n$errdev" else echo "Please enter an existing disk device" fi

Script Test

[[email protected] script]# bash finddev.sh  Please enter an existing disk device [[email protected]  script]# bash finddev.sh /dev/adb /dev/ma============ the following devices do not exist ============== /DEV/ADB  /dev/ma [[email protected] script]# bash finddev.sh /dev/sdadisk /dev /sda: 85.9 gb, 85899345920 bytes255 heads, 63 sectors/track, 10443  cylindersUnits = cylinders of 16065 * 512 = 8225280  bytessector size  (logical/physical):  512 bytes / 512 bytesi/o size   (minimum/optimal):  512 bytes / 512 bytesdisk identifier: 0x0004d0da    Device Boot      Start          end      blocks   id  system/ Dev/sda1   *           1           64      512000   83  linuxpartition 1  does not end on cylinder boundary./dev/sda2               64       10444     83373056   8e  linux lvm

2, 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;

3. 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;

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

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

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

5. 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;

6. Please describe in detail the start-up process of the CentOS system (detailed to what each process system does)

7. Add a new piece of hardware to the CentOS 6 running on the virtual machine, providing two primary partitions;

(1) Create a new two primary partition for the hard disk, and install grub for it;

(2) Provide kernel and RAMDisk files for the first primary partition of the hard disk, and provide rootfs for the second partition;

(3) for Rootfs to provide bash, LS, cat programs and the library files that depend on;

(4) Provide the configuration file for grub;

(5) The new hard disk is set as the first boot item and can start the target host normally;

8. Write a script

(1) can accept four parameters: Start, stop, restart, status

Start: Output "starting script name finished."

...

(2) Any other parameters, all error exits;

9, write a script to determine whether a given user is logged into the current system;

(1) If the login, the user login, the script terminates;

(2) Every 3 seconds, check whether the user is logged in;

10, write a script, display the user selected to view the information;

CPU) Display CPU Info

MEM) Display Memory info

Disk) Display Disk info

Quit) quit

Not these four options, the prompt error, and ask the user to re-select, only to give the correct choice;

11. Write a script

(1) Return a user's UID and shell with function implementation; The user name is passed through the parameters;

(2) Prompt the user to enter a user name or enter "quit" to exit;

When the user name is entered, the calling function displays the user information;

Exit the script when the user enters quit, and further: after displaying the user-related information you typed, remind the output user name or quit again:

12, write a script to complete the following functions (using functions)

(1) Prompt the user to enter the name of an executable command; Get all the library files that this command relies on;

(2) Copy the command file to the corresponding Rootfs path in the/mnt/sysroot directory, for example, if the original path of the copied file is/usr/bin/useradd, it is copied to the/mnt/sysroot/usr/bin/directory;

(3) Copy the library files that this command relies on to the corresponding Rootfs path in the/mnt/sysroot directory, and the rules related to the above command;

This article is from the "Allen" blog, so be sure to keep this source http://allen05.blog.51cto.com/7743530/1908251

Shell Scripting Exercises