installing rhel8

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script and validation for the lvm

[root@ansserve1 ~]# cd / [root@ansserve1 /]# ll total 24 lrwxrwxrwx.   1 root root    7 Aug 11  2022 bin -> usr/bin dr-xr-xr-x.   5 root root 4096 Aug 11  2022 boot drwxr-xr-x.  20 root root 3200 May  8 20:11 dev drwxr-xr-x. 143 root root 8192 May  8 20:11 etc drwxr-xr-x.   3 root root   18 Aug 11  2022 home lrwxrwxrwx.   1 root root    7 Aug 11  2022 lib -> usr/lib lrwxrwxrwx.   1 root root    9 Aug 11  2022 lib64 -> usr/lib64 drwxr-xr-x.   2 root root    6 Apr 11  2018 media drwxr-xr-x.   2 root root    6 Apr 11  2018 mnt drwxr-xr-x.   3 root root   16 Aug 11  2022 opt dr-xr-xr-x. 193 root root    0 May  8 20:11 proc dr-xr-x---.   8 root root  245 Feb 20 16:29 root drwxr-xr-x.  41 root root 1260 May  8 20:11 run lrwxrwxrwx.   1 root root    8 Aug 11 ...
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Important concepts and bits

what is mtab? matb is the currently mounted file system. what is fstab? fstab is the to be mounted file system while booting. difference between mtab and fstab? mtab is mounted file system. fstab is the file system tab to be mounted. where is the fstab conf and mtab conf fstab and mtab are located in the etc directory. etc is located in the / directory. / is the top of hierachy in linux.
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shell script to create and extending the volume

[bala@ansserve1 ~]$ ./script2.sh  This script must be run as root. [bala@ansserve1 ~]$ sudo ./script2.sh [sudo] password for bala:  --------list the devices------- NAME                       MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT sda                          8:0    0   64G  0 disk  |-sda1                       8:1    0    1G  0 part /boot `-sda2                       8:2    0   63G  0 part    |-centos_ansserve-root   253:0    0 40.8G  0 lvm  /   |-centos_ansserve-swap   253:1    0  2.3G  0 lvm  [SWAP]   |-centos_ansserve-home   253:2    0 19.9G  0 lvm  /home   `-centos_ansse...
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