Linux

Problem: Getting error mount: unknown filesystem type ‘exfat’ when  inserting USB flash drive to USB port using Fedora Core 20
Solution:
Execute the following commands:

wget

rpm -ivh fuse-exfat-1.0.1-1.fc20.x86_64.rpm

Re-Insert Device

Edit /etc/bashrc using

vim /etc/bashrc

add your alias to the file, for example if ll should be the alias for ls -l then add

alias ll="ls -l"

to /etc/bashrc and save the file.
 
For changes to take immediate effect execute the following command:

. ~/.bashrc

Use the uname -m command within the Terminal.

uname -m

The above command displays the Machine Hardware Name and indicates whether your system is 32-Bit or 64-Bit.
If your system is 64-Bit then the output will be x86_64 and for 32-Bit the output will be either i686 or i386

Open the Terminal Window
Download the Installation file using the wget command

wget

Install the deb package

sudo dpkg -i unifi-video_3.1.1~Ubuntu14.04_amd64.deb; sudo apt-get install -f

Open a new Browser Window and type in  replacing <IP> with the NVR IP address to initiate the setup process.

Open the Terminal Window
Execute the following command to install the Ubuntu Desktop

sudo apt-get --install-recommends install ubuntu-desktop

mount -t cifs -o username=YOURUSERNAME,password=YOUPASSWORD //server_name_or_ip/folder_to_mount /mnt/folder_to_mount_to/ By using the above command and by replacing the relevant fields with your details, you should be able to mount your Samba Share on Linux Explanation: mount = mounts a filesystem -t = Used to indicate the filesystem type, in this case cifs cifs = Common Internet Filesystem...

Edit /etc/logwatch/conf/logwatch.conf and override the TmpDir value by changing the default temp directory to /tmp from /var/cache/logwatch
/tmp automatically gets trimmed by most Linux distributions meaning that there won’t be a built up of old log files.
Now delete the old files in /var/cache/logwatch using the command below:

rm -rf /var/cache/logwatch/*

Use the gpasswd command. The gpasswd command is used to administer /etc/group, and /etc/gshadow.
Use to following command:

sudo gpasswd -d user group

Replace user with the user you wish to remove and group with the group. The -doption is to remove the user from the named group.

Run the below command to see the contents of the archive without extracting.

tar -tf archive.tar

The option -t will list the file contents and -f refers to the file archive.

Edit the .bash_profile file in your home directory

vi ~/.bash_profile

Add the following lines to your .bash_profile file

export VISUAL=vim
export EDITOR="$VISUAL"

Note: Replace vim with any other preferred editor such as nano

Logout and login again for changes to take effect.
If you want the changes to come into play immediately, execute the following command

. ~/.bash_profile

Open a new Terminal Window Type the following command replacing IPADDRESSTOBLOCK with the IP Address that you wish to block. iptables -A INPUT -s IPADDRESSTOBLOCK -j DROP Explanation of above command: -A = Append one or more rules to the end of the selected chain -s = Source, in this case the IP address to block -j = This indicates what to do if the rule matches Save the Rule to the IPTables...

Open a new Terminal Window
Type in the following command and press enter:

sudo dpkg-reconfigure tzdata

Select your Geographical Area and select OK

Select your Time zone and select Ok

Your new Time zone is set, type in the Date command to confirm.

Open a new Terminal Window
Type in the command

java -version

The output should look similar to the below:

java version "1.7.0_95"
OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-3)
OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode)

The above code indicates that you are running Java SDK version 7 on your server

Open a new Terminal Window Execute the following command: sudo update-alternatives --config java Output similar to the below will show: There are 4 choices for the alternative java (providing /usr/bin/java). Selection Path Priority Status ------------------------------------------------------------ 0 /usr/lib/jvm/java-8-oracle/jre/bin/java 1092 auto mode * 1 /usr/lib/jvm/java-7-openjdk...

Open a new Terminal Window and type the following command:
du -shc folderPath
Explanation of the du command:
du - estimate file space usage

-s, --summarize, display only a total for each argument
-h, --human-readable, print sizes in human readable format (e.g., 1K 234M 2G)
-c, --total, produce a grand total

 
Replace folderPath with the folder to check the size on.