Script to download the latest linux kernel

Here is a script that will download the latest kernel source kernel.org. THe script works on the current html page of kernel.org and might break if anything is changed in the page of kernel.org.

latest_kernel:

#!/bin/bash latest_kernel () { latest_link=$(grep -A 1 "latest_link" page | tail -1 | cut -d "\"" -f 2 | cut -d "." -f 2-) prefix=https://www.kernel.org link=$prefix$latest_link for((i=0;i<=2;i++)) do echo -e "\n \n downloading from $link \n \n" wget -c $link comp=$? if [ $comp -eq 0 ] then echo "Download complete" rm page exit else echo "Trying again" fi done echo "Download failed" rm page } wget -O page wget -O page www.kernel.org latest_kernel

save the script as latest_kernel.sh.

Run the script by giving it execute permission. Please note that the from which ever folder the script is executed the user running the script needs to have the permission to create and delete files and folders as the script places the downloaded source in the same folder and also creates a temporary file and deletes it.

$ chmod 777 latest_kernel.sh $ ./latest_kernel.sh --2013-08-01 22:23:17-- http://wget/ Resolving wget... failed: Name or service not known. wget: unable to resolve host address “wget” --2013-08-01 22:23:17-- http://www.kernel.org/ Resolving www.kernel.org... 149.20.4.69, 198.145.20.140 Connecting to www.kernel.org|149.20.4.69|:80... connected. HTTP request sent, awaiting response... 301 Moved Permanently Location: https://www.kernel.org/ [following] --2013-08-01 22:23:18-- https://www.kernel.org/ Connecting to www.kernel.org|149.20.4.69|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 17430 (17K) [text/html] Saving to: “page” 100%[===================================================================================>] 17,430 27.8K/s in 0.6s 2013-08-01 22:23:20 (27.8 KB/s) - “page” saved [17430/17430] FINISHED --2013-08-01 22:23:20-- Downloaded: 1 files, 17K in 0.6s (27.8 KB/s) downloading from https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.10.4.tar.xz --2013-08-01 22:23:20-- https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.10.4.tar.xz Resolving www.kernel.org... 149.20.4.69, 198.145.20.140 Connecting to www.kernel.org|149.20.4.69|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 73187712 (70M) [application/x-xz] Saving to: “linux-3.10.4.tar.xz” 100%[===================================================================================>] 73,187,712 97.3K/s in 11m 18s 2013-08-01 22:34:40 (105 KB/s) - “linux-3.10.4.tar.xz” saved [73187712/73187712] Download complete

Thus we can see from the ouput that the latest kernel 3.10.4 has been downloaded. In case the download gets interrupted then the script will retry the download 3 times before quitting with the message of "Download Failed".