How to create a file of specific size using Linux command line

Run for a second:

yes "some text" > testfile.txt

Reduce size:

truncate -s 50M testfile.txt

Create 50M file using fallocate command

fallocate -l 52428800 testfile.txt

To be more exact using inline arithmetic:

fallocate -l $((50*1024*1024)) > testfile.txt

Using head command

head -c 50MB /dev/urandom > testfile.txt
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How to generate Self-Signed SSL on cPanel server using command line

Run and put your domain:

read -p "Domain: " domain; username=`/scripts/whoowns $domain`; email=`grep @ /var/cpanel/users/$username |tail -n1 |cut -d '=' -f2|sed -e 's/@/\%40/'`; whmapi1 generatessl domains=$domain countryName=US stateOrProvinceName=Texas localityName=Houston organizationName="The Justice League of GG" emailAddress=$email pass=`openssl rand -base64 15` keysize=2048 skip_certificate=0

Now use WHM to install it

Enjoy!… Read the rest

How to specify which IP address to use for curl or wget commands

Useful when you try to send a request from cPanel shell from your Dedicated IP address

For curl you need to use –interface to specify IP address

Example:

curl --interface 11.22.33.44 http://alltime.pp.ua/

For wget you need to use –bind-address to set IP from which you need to send a request

wget --bind-address=192.0.2.116 http://alltime.pp.ua/
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How to install busybox

BusyBox combines tiny versions of many common UNIX utilities into a single small executable.

This may help you when you got your shell broken since busybox in independent binary which includes a lot of commands inside.

In simple words this tool can save your life ๐Ÿ™‚

Find the latest version of busybox at https://busybox.net/downloads/binariesRead the rest

How to fix a login issue after WordPress Multisite split

The slave installation will lose users

wp user list

+—-+————+————–+————+—————–+——-+
| ID | user_login | display_name | user_email | user_registered | roles |
+—-+————+————–+————+—————–+——-+
+—-+————+————–+————+—————–+——-+

And you won’t be able to create new admin user because you don’t have appropriate MySQL tables

wp user create admin [email protected]
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