how can i resolve sudo: rosdep: command not found

You can try installing rosdep by running the following command:

sudo apt-get install python-rosdep

If the package is already installed, you can try updating the package using the following command:

sudo rosdep update

If these commands do not resolve the issue, you may need to check your ROS installation and ensure that it is properly configured.

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ftpput: command not found

The error "ftpput: command not found" indicates that the "ftpput" command is not recognized or installed on your system. This command is typically used for uploading files to an FTP server.

To resolve this issue, you can try the following steps:

1. Make sure that you have the necessary FTP client software installed on your system. On Linux, you can typically install the "ftp" package using the package manager specific to your distribution (e.g., apt, yum, dnf, etc.). For example, on Ubuntu, you can use the following command to install the package:

   sudo apt install ftp

2. If the FTP client software is already installed, it is possible that the "ftpput" command is not in your system's default search path. In that case, you can try providing the full path to the "ftpput" command. The exact path may vary depending on your system and how the FTP client software is installed. You can search for the location of the "ftpput" command using the following command:

   which ftpput

This command will display the full path to the "ftpput" command if it is available on your system. You can then use this full path to run the command, for example:

   /usr/bin/ftpput <arguments>

If you continue to experience issues, please provide more details about your operating system and the steps you have already taken to troubleshoot the problem.

configure: error: Not found libxml2 library

To resolve the "configure: error: Not found libxml2 library" issue, you need to install the libxml2 library on your system. Here's how you can do it on different platforms:

1. Ubuntu/Debian:
Run the following command to install the libxml2 library:

   sudo apt-get install libxml2-dev

2. CentOS/Fedora:
Use the following command to install the libxml2 library:

   sudo yum install libxml2-devel

3. macOS (using Homebrew):
Open a terminal and execute the following command to install the libxml2 library:

   brew install libxml2

After installing the libxml2 library, you should be able to proceed with your configuration without encountering the "Not found libxml2 library" error.