[root@i-m7eow76r ~]# ulimit -n
1024
[root@i-m7eow76r ~]# ulimit -n 10240
[root@i-m7eow76r ~]# ulimit -n
10240
[root@i-m7eow76r ~]# vi / etc/security/limits.conf
dmdba soft nofile 10240
dmdba hard nofile 65536
[root@i-m7eow76r ~]# mkdir -p /mnt/dm
[root@i-m7eow76r ~]# mount /opt/dm8_setup_rh7_64_ent_8.1.1.88_20200629. iso /mnt/dm
mount: /dev/loop0 is write-protected and will be mounted as read-only
[root@i-m7eow76r ~]# mkdir /dm8
[root@i-m7eow76r ~]# chown dmdba:dinstall /dm8
[root @i-m7eow76r ~]# chown dmdba:dinstall /opt/dm.key
[root@i-m7eow76r ~]# su-dmdba
[dmdba@i-m7eow76r ~]$ cd /mnt/dm
Graphical interface installation software
[dmdba @i-m7eow76r dm]$ ./DMInstall.bin
[root@i-m7eow76r ~]# /dm8/script/root/root_installer.sh
[dmdba@i-m7eow76r ~]$ vi .bash_profile
export PATH="$PATH:$DM_HOME/bin:$DM_HOME/tool"