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[ Linux Command Manual](#) The Linux `tftp` command is used to transfer files. TFTP (Trivial File Transfer Protocol) is a simple file transfer protocol, typically used for transferring small files over a network. Compared to FTP (File Transfer Protocol), TFTP is more lightweight and has relatively simpler functionality. TFTP is commonly used in local area network (LAN) environments, especially in scenarios like firmware upgrades for network devices and transferring configuration files. TFTP uses UDP (User Datagram Protocol) as its transport layer protocol, with a default port number of 69. Since UDP is a connectionless protocol, TFTP has faster transfer speeds but lower reliability, so packet loss may occur during transmission. ### Syntax tftp **Common Options:** The `tftp` command supports several common options. Here are some typical options and their functions: * `-v`: Enable verbose mode, displaying more debugging information. * `-c`: Specify the file to transfer. * `-l`: Specify the local filename. * `-r`: Specify the remote filename. * `-g`: Get a file from the server (equivalent to the `get` command). * `-p`: Put a file to the server (equivalent to the `put` command). **Operation Instructions:** * connect: Connect to a remote TFTP server. * mode: Set the file transfer mode. * put: Upload a file. * get: Download a file. * quit: Exit. * verbose: Display detailed processing information. * trace: Display packet path. * status: Display current status information. * binary: Set binary transfer mode. * ascii: Set ASCII transfer mode. * rexmt: Set the retransmission timeout for each packet. * timeout: Set the total retransmission timeout. * help: Display help information. * ? : Display help information. * * * ## Basic Usage of the TFTP Command ### Connecting to a TFTP Server To connect to a TFTP server, you can use the following command: tftp 192.168.1.1 Here, `192.168.1.1` is the IP address of the TFTP server. After executing this command, the system will enter the TFTP interactive mode, and the prompt will change to `tftp>`. ### Downloading a File In TFTP interactive mode, you can use the `get` command to download a file from the server. For example, to download a file named `config.txt`: tftp> get config.txt This command will download the `config.txt` file from the TFTP server to the current working directory. ### Uploading a File To upload a file to the TFTP server, you can use the `put` command. For example, to upload a file named `backup.cfg`: tftp> put backup.cfg This command will upload the `backup.cfg` file to the TFTP server. ### Exiting TFTP Interactive Mode To exit the TFTP interactive mode, you can use the `quit` or `exit` command: tftp> quit * * * ## Examples Connect to the remote server "218.28.188.288", then use the `put` command to download the file "README" from its root directory. You can use the following command: tftp 218.28.188.288 #Connect to the remote server After connecting to the server, you can perform the corresponding operations as follows: $ tftp 218.28.188.228 #Connect to the remote server tftp> ? #Use ? to refer to help Commands may be abbreviated. Commands are: #Help command list connect connect to remote tftp mode set file transfer mode put send file get receive file quit exit tftp verbose toggle verbose mode trace toggle packet tracing status show current status binary set mode to octet ascii set mode to netascii rexmt set per-packet retransmission timeout timeout set total retransmission timeout ? print help information tftp>get README #Remotely download the README file getting from 218.28.188.288 to /home/cmd Recived 168236 bytes in 1.5 seconds[112157 bit/s] tftp>quit #Leave tftp Use the `-v` option to enable verbose mode: tftp -v 192.168.1.1 ### Downloading a File and Specifying a Local Filename Assuming you want to download the `config.txt` file from the TFTP server and save it as `local_config.txt`, you can use the following command: tftp 192.168.1.1 tftp> get config.txt local_config.txt ### Uploading a File and Specifying a Remote Filename Assuming you want to upload the local `backup.cfg` file to the TFTP server and save it as `remote_backup.cfg`, you can use the following command: tftp 192.168.1.1 tftp> put backup.cfg remote_backup.cfg ### Downloading a File Directly Using Command-Line Options If you don't want to enter the TFTP interactive mode, you can download a file directly from the command line using the `-g` option: tftp -g -r config.txt 192.168.1.1 This command will download the `config.txt` file from the server `192.168.1.1`. * * * ## Limitations of TFTP Although TFTP is simple and easy to use, it also has some limitations: * **Lower Reliability**: Since TFTP uses the UDP protocol, packet loss may occur during transmission, especially in unstable network environments. * **Limited Functionality**: TFTP does not support advanced features like directory listing or file deletion; it is only suitable for simple file transfers. * **Lower Security**: TFTP has no built-in encryption mechanism, so the content of transferred files may be eavesdropped on or tampered with. [ Linux Command Manual](#)