Linux 命令(249)—— unset 命令(builtin) 编程算法shell 文章目录 1.命令简介 2.命令格式 3.选项说明 4.返回值 5.常用示例 参考文献 1.命令简介 unset 删除指定的 Shell 变量或函数。 注意,unset 不能删除具有只读属性的 Shell 变量和环境变量。 2.命令格式 unset [-fv] [name ...] 当不指定选项时,...
在pip install pyinstaller安装成功后。输入pyinstaller并没能成功运行。 故障分析: 经查阅网络上很多资料后发现,是linux环境下没有配置环境变量。 添加环境变量的步骤: 1. 打开终端并输入以下命令: export PATH=$PATH:/xxx/python-3.9.11/bin 注意,这里的$PATH就是环境变量的值,这句话的意思在原有PATH后面加上:...
As Linux users, we use files and directories on a regular basis. Files allow us to store important data whereas directories allow us to organize files in a proper way. In addition to this, we often create ahierarchical directory structureto organize the contents in a better way. In this be...
Thecurrent working directoryis the directory from which you are running the commands. To change the current working directory, use thecdcommand. To create a new directory in another location, you’ll need to provide the parent directory’s absolute or relative file path. For example, to create...
2. Add a user with a different home directory By default adduser command creates user's home directory under /home. You can add--home or -doption to create a new user account with a different directory. Syntax: adduser [username] --home [directory-path] ...
But at times, you'll find yourself in a situation where you have to edit existing files in the terminal itself. For example, modifying config files located in the /etc directory. As a desktop Linux user, you could still use GUI editors for editing config files even as root. I'll show...
This command downloads the file file.txt from www.example.com and saves it in the current directory. Example 3: Sending a POST Request You can use cURL to send POST requests to a server. Here’s how: curl -d "param1=value1¶m2=value2" -X POST http://www.example.com This comm...
Login to the linux box and assume root 1 sudo su - Edit /etc/profile and add the following lines to the bottom of the file: 1 2 3 4 5 6 7 8 # command line audit logging function log2syslog { declare COMMAND COMMAND=$(fc -ln -0) logger -p local1.notice -t bash -i -...
Copying files in Linux command line Let me show you a few examples of copying files. Copy a file to another directory To copy one file to another directory, all you have to do is follow the given command syntax: cp Source_file Destination_directory ...
Various tests performed by the file command in linux 1. Filesystem Tests The first thing that the file command checks are the filesystem attributes of the file. This includes: File Type: Whether the file is a regular file, directory, symbolic link, socket, etc. ...