How to Download CentOS 7.6 ISO and Create a Custom Bootable USB Drive

In this article, we will explore the process of downloading CentOS 7.6 ISO and creating a custom bootable USB drive using various commands and tools.

Downloading CentOS 7.6 ISO

To start, you need to download the CentOS 7.6 ISO file. You can do this by visiting the official CentOS website and selecting the 'Download' option. Choose the correct version of CentOS (x86_64 or i386) and select the 'ISO' format.

Once you have downloaded the ISO file, you can verify its integrity using the following command:

```

sha256sum centos-7.6.1810-x86_64-dvd.iso

```

Creating a Custom Bootable USB Drive

To create a custom bootable USB drive, you will need to use the `dd` command and copy the ISO file to the USB drive.

First, insert your USB drive and identify its device name using the following command:

```

lsblk

```

Next, use the `dd` command to copy the ISO file to the USB drive:

```

sudo dd if=centos-7.6.1810-x86_64-dvd.iso of=/dev/sdb bs=4M

```

Replace `/dev/sdb` with your actual device name.

Customizing the Bootable USB Drive

To customize the bootable USB drive, you can modify the `isolinux/isolinux.cfg` file using the following command:

```

sed -i 's/timeout 600/timeout 10/g' isolinux/isolinux.cfg

```

This will set the timeout to 10 seconds.

You can also add a custom boot menu label and default kernel using the following commands:

```

label autoinstaller

menu label autoinstaller

menu default

kernel vmlinuz

append initrd=initrd.img ks=hd:sdb1/ks.cfg' isolinux/isolinux.cfg

```

In this article, we have shown how to download CentOS 7.6 ISO and create a custom bootable USB drive using various commands and tools. We also demonstrated how to customize the bootable USB drive by modifying the `isolinux/isolinux.cfg` file.

By following these steps, you can create a custom bootable USB drive that is tailored to your specific needs and requirements.

Centos 7.6 1810 iso download