Script Exercise 2

Tag: Shell

Exercise: write a script to complete the following functions:

1. List all disk devices on the current system;

2. Select a disk device and display all the partition information on the specified device;

3. Ask the user if they want to erase all existing partitions on the disk and then re-Add the three partitions;

Y or yes: continue

N or no: Abort the script

Other characters remind the user to re-enter valid characters

4. Execute the corresponding partition operation after the user selects Yes

Create three partitions

Primary partition 1: 512 M, ext4

Primary partition 2: 512 M, swap

Primary partition 3: 2g, ext4

5. format the created partitions as described above as the corresponding file system;

6. Mount primary partition 1 to the/mnt/boot directory, and primary partition 3 to the/mnt/sysroot directory;

Extension: After the above 3rd steps start, check whether any partition on the device is mounted. If yes, uninstall it first;

#! /Bin/bash #################################### ###################################### file name: 002.sh# Author: lookback # Email: [email protected] # created time: fri 11 Jul 2014 05:43:44 pm CST ################################# ######################################## bootdir = "/mnt/Boot" sysroot = "/mnt/sysroot" clearecho "The following disk is available on the system, select a disk for change. "Echo $ (fdisk-L | grep-oe '^ disk [[: Space:] +/dev/[S | H] d [A-Z] '| grep-oe'/dev/[S | H] d [A-Z] '| sort-u) read-P "Enter the full name of a disk device (for example,/dev/sdb ): "sdnoclearwhile [-z" $ (echo "$ sdno" | grep-oe '^/dev/[S | H] d [A-Z] $') "]; doecho "The following disk is available on the system. Select a disk to change it. "Echo $ (fdisk-L | grep-o '^/dev/[S | H] d [A-Z]' | sort-u) read-P" input error, plz input agian: "sdnodoneclear & Echo" $ The following table lists the partition information of an sdno Disk: "parted $ sdno print #====================================== ============================ cat <EOF the script program will partition, format, and mount the disk $ sdno. Next the operation may cause loss of all your data. Do you want to continue? If you want to continue, enter y | y, if you want to exit, enter n | n. eofread-P "Enter your option:" nextuntil [["$ next" = ~ [Yynn]; doclearread-P "input error, plz input agian: "nextdoneif [" $ next "=" Y "-o" $ next "=" Y "]; thenmountcheck = 'mount | grep-oe "^ $ sdno [0-9] +" 'If [-n "$ mountcheck"]; thenclearecho "detects that $ sdno has Mount partitions, the script is uninstalling these partitions and deleting them ...... "For I in 'echo" $ mountcheck "'; do umount $ I; sleep 1; donewhile! Mke2fs-T ext4-F $ {sdno} &>/dev/NULL; do DMSetup remove_all; donefiecho-e "n \ NP \ N1 \ n + 512m \ NN \ NP \ N2 \ n + 512m \ NN \ NP \ N3 \ n + 2G \ NT \ N2 \ n82 \ nw "| fdisk $ {sdno} &>/dev/nullfor I in $ (fdisk-L $ sdno | grep-oe" ^ $ {sdno }[ 0-9] + "); do while [-n "$ (CAT/proc/Partitions | grep-e" $ I ")"]; dopartx-A $ sdno & kpartx-AF $ sdno; sleep 1 donedonewhile! Mke2fs-T ext4 $ {sdno} 1 &>/dev/NULL; do DMSetup remove_all; donemke2fs-T ext4 $ {sdno} 3 &>/dev/nullmkswap $ {sdno} 2 [-d "$ bootdir"] | mkdir-p $ bootdir [-d "$ sysroot "] | mkdir-p $ sysroot [-z" $ (Mount | grep "$ bootdir ") "] | umount $ bootdir [-z" $ (Mount | grep "$ sysroot ") "] | umount $ sysrootmount $ {sdno} 1 $ bootdirmount $ {sdno} 3 $ sysroot # Swapon $ {sdno} 2 &>/dev/nullecho" execution ended... "fi