Operation and Maintenance
Linux Operation and Maintenance
How to download files by date using Linux shell ftp
How to download files by date using Linux shell ftp
最近做项目遇到这样的需求要求ftp获取远程数据的文件，根据文件的创建时间点下载文件。下面小编给大家分享知识点小结，感兴趣的朋友要求看看吧
需求：ftp获取远程数据的文件，根据文件的创建时间点下载文件。 可以自行扩展根据文件的大小等其他需求。
知识点总结：
1、获取文件的时间：
ls -lrt|awk '{print $6" "$7" "$8}'
时间内容：
Sep 8 16:03
2、时间格式转换
date -d "Sep 8 16:03" +%Y%m%d%H%M
转换结果：
201709081603
3、指定文件名，正则匹配
pattern="${month}.*.dat$"
ls -lrt |awk '$9 ~ /'$pattern'/ {print $6" "$7" "$8}'注意awk里面模式变量用' '括起来，.*为任意字符，$表示以dat结尾。pattern的内容根据需求自行设定
4、对文件时间进行比较
ls -lrt |awk '$9 ~ /'$pattern'/ {\
ctime="date -d \""$6" "$7" "$8"\" +%Y%m%d%H%M"; \
ctime|getline filetime; if( filetime > '$checktime' ) print $9 ; }获取文件的时间，对时间进行转换，然后对转换后的时间与给定的$checktime进行比较，如果比$checkime的时间大，则显示文件名。
|getline 为执行命令获取命令执行的结果。
以上就完成了对本地文件时间进行比较的方法。接下来判断远程主机的文件时间。
5、ftp命令登录远程主机，并过滤得到要查询的文件内容
ftp_cmd(){
ftp -i -n <<!
open $ftp_ip
user $get_user $get_pwd
binary
cd ${get_dir}
lcd ${local_dir}
$*
bye
!
}
pattern="${month}.*.dat$"
files=$(ftp_cmd ls -lrt |awk '$9 ~ /'$pattern'/ {\
ctime="date -d \""$6" "$7" "$8"\" +%Y%m%d%H%M"; \
ctime|getline filetime; if( filetime > '$checktime' ) print $9 ; }'|xargs)通过函数调用实现ftp到指定主机，cd到指定目录，通过awk获取ls -lrt的结果，然后计算时间，把大于指定时间的文件名获取到。
6、下载文件
ftp_cmd mget $files
The above is the detailed content of How to download files by date using Linux shell ftp. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1387
52
How to use docker desktop
Apr 15, 2025 am 11:45 AM
How to use Docker Desktop? Docker Desktop is a tool for running Docker containers on local machines. The steps to use include: 1. Install Docker Desktop; 2. Start Docker Desktop; 3. Create Docker image (using Dockerfile); 4. Build Docker image (using docker build); 5. Run Docker container (using docker run).
How to view the docker process
Apr 15, 2025 am 11:48 AM
Docker process viewing method: 1. Docker CLI command: docker ps; 2. Systemd CLI command: systemctl status docker; 3. Docker Compose CLI command: docker-compose ps; 4. Process Explorer (Windows); 5. /proc directory (Linux).
What to do if the docker image fails
Apr 15, 2025 am 11:21 AM
Troubleshooting steps for failed Docker image build: Check Dockerfile syntax and dependency version. Check if the build context contains the required source code and dependencies. View the build log for error details. Use the --target option to build a hierarchical phase to identify failure points. Make sure to use the latest version of Docker engine. Build the image with --t [image-name]:debug mode to debug the problem. Check disk space and make sure it is sufficient. Disable SELinux to prevent interference with the build process. Ask community platforms for help, provide Dockerfiles and build log descriptions for more specific suggestions.
What computer configuration is required for vscode
Apr 15, 2025 pm 09:48 PM
VS Code system requirements: Operating system: Windows 10 and above, macOS 10.12 and above, Linux distribution processor: minimum 1.6 GHz, recommended 2.0 GHz and above memory: minimum 512 MB, recommended 4 GB and above storage space: minimum 250 MB, recommended 1 GB and above other requirements: stable network connection, Xorg/Wayland (Linux)
vscode cannot install extension
Apr 15, 2025 pm 07:18 PM
The reasons for the installation of VS Code extensions may be: network instability, insufficient permissions, system compatibility issues, VS Code version is too old, antivirus software or firewall interference. By checking network connections, permissions, log files, updating VS Code, disabling security software, and restarting VS Code or computers, you can gradually troubleshoot and resolve issues.
Can vscode be used for mac
Apr 15, 2025 pm 07:36 PM
VS Code is available on Mac. It has powerful extensions, Git integration, terminal and debugger, and also offers a wealth of setup options. However, for particularly large projects or highly professional development, VS Code may have performance or functional limitations.
What is vscode What is vscode for?
Apr 15, 2025 pm 06:45 PM
VS Code is the full name Visual Studio Code, which is a free and open source cross-platform code editor and development environment developed by Microsoft. It supports a wide range of programming languages and provides syntax highlighting, code automatic completion, code snippets and smart prompts to improve development efficiency. Through a rich extension ecosystem, users can add extensions to specific needs and languages, such as debuggers, code formatting tools, and Git integrations. VS Code also includes an intuitive debugger that helps quickly find and resolve bugs in your code.
How to back up vscode settings and extensions
Apr 15, 2025 pm 05:18 PM
How to back up VS Code configurations and extensions? Manually backup the settings file: Copy the key JSON files (settings.json, keybindings.json, extensions.json) to a safe location. Take advantage of VS Code synchronization: enable synchronization with your GitHub account to automatically back up all relevant settings and extensions. Use third-party tools: Back up configurations with reliable tools and provide richer features such as version control and incremental backups.
