Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Put a profile in AppArmor complain mode
Answer:
Some applications, such as the MySQL server, if you changed the default datadir, you might not be able to startup MySQL.
To solve the problem, put the MySQL profile in AppArmor complain mode can solve the problem.
# sudo aa-complain /usr/sbin/mysqld
Then reload AppArmor
# sudo invoke-rc.d apparmor reload
Set session-wide environment variables
Answer:
Create the file .pam_environment in your home directory.
# vi ~/.pam_environment
FOO=BAR
Add you key=value pairs into this file and save it.
This is the recommended way to store user's environment variables.
Set system-wide environment variables in Ubuntu
Answer:
The recommended way now is to edit the file /etc/environment .
# vi /etc/environment
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
Add you key=value pairs into this file and save it.
Mount a filesystem by UUID in Linux
Anwser:
Assumed you know the UUID of your harddisks, you want to mount it for use, try the following method:
# mount -U 9f95f559-9986-4dfc-8661-849bb54ed5a5 /mnt/data1How to list all the UUID of my hard disks
Answer:
To list all the UUID of my hard disks, you can use the blkid command.
# sudo blkid
/dev/sda1: UUID="9f95f559-9986-4dfc-8661-849bb54ed5a5" TYPE="ext3"
/dev/sda5: TYPE="swap" UUID="0fe4eedc-65dd-4b46-85c9-11795f2cdc57"
