Linux

DDNS with Linode and a Linux machine aws cloud linux til
This post details how to update a domain record entry on Linode based on the public IP of a machine running Linux. We will create a python script and use the Linode API to accomplish this. Create a personal token in Linode From your Linode console under My Profile > API Tokens you can create a personal access token. The script only requires read/write access to the Domains scope. From here you can also set your desired expiration time. Read more...
Remove EXIF data from images linux til
Install exiftool. sudo apt install exiftool # sudo apt install libimage-exiftool-perl Remove all tags. exiftool -all= image.jpg Remove only EXIF tags exiftool -EXIF= image.jpg
Setup Linux Wireguard server and client linux networking til
Server and client setup Install Wireguard on both server and client sudo apt install wireguard Create the public and private key on both server and client. Store the private keys in a secure place. wg genkey | tee privatekey | wg pubkey > publickey Server configuration Create and open the file /etc/wireguard/wg0.conf. Insert the following block and view the examples on the table below. Variable Exmaple <server-ip> 10.0.1.1 <subnet> 24 <interface> eth0 <server-private-key> kj202323j23mwnew0= <server-port> 51820 [Interface] Address = <server-ip>/<subnet> SaveConfig = true PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o <interface> -j MASQUERADE; ip6tables -A FORWARD -i wg0 -j ACCEPT; ip6tables -t nat -A POSTROUTING -o <interface> -j MASQUERADE PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o <interface> -j MASQUERADE; ip6tables -D FORWARD -i wg0 -j ACCEPT; ip6tables -t nat -D POSTROUTING -o <interface> -j MASQUERADE ListenPort = `<server-port>` PrivateKey = <server-private-key> Bring up Wireguard on the client Read more...
Get interface IP address from terminal linux til networking
Grabbing just an IP address from a network interface can be useful for scripting. In the example below the assumed interface is eth0. ip a show eth0 | grep "inet " | cut -d' ' -f6 | cut -d/ -f1 You can then save this into a variable and use it in other commands. local_ip=$(ip a show eth0 | grep "inet " | cut -d' ' -f6 | cut -d/ -f1) python3 -m http. Read more...
Mount an NFS share in Linux linux storage til
Install the NFS client pacakge. For distros that use yum install nfs-utils. sudo apt install nfs-common Manually mount the share in a directory. Replace the following with your own values: server with your NFS server /data with your exported directory /mnt/data with your mount point sudo mount -t nfs server:/data /mnt/data To automatically mount the NFS share edit /etc/fstab with the following: # <file system> <mount point> <type> <options> <dump> <pass> server:/data /mnt/data nfs defaults 0 0 To reload fstab verbosely use the following command: Read more...
Useful tar commands til linux
Introduction These are tar commands that I use often but need help remembering. Contents Introduction Create an archive Create a gzip compressed archive Extract an archive Extract a gzip compressed tar archive List files in an archive List files in a compressed archive Extract a specific file from an archive Create an archive tar -cvf send.tar send/ -c Create an archive -v Verbose -f Specify filename Create a gzip compressed archive tar -czvf send. Read more...