I often experience a problem to umount a directory:
umount /mnt/dir umount: /mnt/dir: device is busy
Files tab is not shown in Control Panel
Symptoms
Cannot manage the subscription. The plesk agent exception are thrown when accessing subscription management options:
- When opening the ‘Files’ tab:
Error message or description of the request: In response to the HTTP-request to the agent at 'https://203.0.113.2:8443/agent.cgi' An invalid HTTP-code '502 ' File JsonRpc.php File JsonRpc.php Line 273 Type Service_Agent_Exception
Resetting OS X Password
The simplest way is by Restarting Setup Assistant
Restart the Setup Assistant and create a new Administrator account, then use that account to reset the password to the original account.
You can restart the Setup Assistant by performing the following:
Boot into Single User Mode (hold ⌘ cmd + S at boot).
Rsync Command Example
This is an example for copying data from a local server to a remote server (push).
# cd / (starting directory)
# rysnc -avhP local_directory user@1.1.1.1:/remote_directory
-a = archive mode; equals -rlptgoD
-v = verbose
-h = human readable
-P = show progress
Display Available inodes
If you need to check to find the number of available inodes, type:
# df -i
Output shows this:
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/sda3 524288 422613 101675 81% /
Recover Corrupted Partition From A Bad Superblock
Boot your Linux server from rescue disk.
At boot: prompt, press F5 then type command linux rescue.
Find superblock locations for /dev/sda3:
# dumpe2fs /dev/sda3 | grep superblock
How To Set Up an NFS Share on Ubuntu 14.04
Download and Install the Components
You need to install the necessary components on the host server.
# sudo apt-get update
# sudo apt-get install nfs-kernel-server
How To Set Up an NFS Mount on Ubuntu 14.04
Download and Install the Components
You need to install the necessary components on the client server.
# sudo apt-get update
# sudo apt-get install nfs-common
How to reload sysctl.conf
On FreeBSD:
# sudo /etc/rc.d/sysctl reloadOn Linux:
# sudo sysctl -p /etc/sysctl.confHow To Create a File with Random Zeros and Ones
Here is how to create a file with random 1s and 0s.
Example 1GB File:
dd if=/dev/urandom of=test1 bs=1M count=1024Example 10GB File:
dd if=/dev/urandom of=test1 bs=1M count=10240