Category: System

Java Code 1. Introduction to Sed sed is a stream editor that processes content one line at a time. During processing, it stores the current line in a temporary buffer called the “pattern space,” then uses sed commands to process the content in the buffer. Once processing is complete, it sends the buffer’s …

In our network maintenance work, we often need to back up data. While the task is not complicated, it is quite time-consuming. Here I share a Linux backup script that easily achieves automatic backups and can retain backup archives for N days. This script consists of two files: an executable file backup.sh, and …

Name: cpUsage: All usersSyntax: cp [options] source destcp [options] source… directoryDescription: Copy one file to another, or copy several files to another directory. The -a option preserves as much of the file status, permissions, and other data as possible …

Today I used Spotlight to check the memory usage on the development server, and only 60MB was left. You can use the following method to clear the cache. Frequent file access can cause a significant increase in system Cache usage.
First, use free -m to check the remaining memory[root@Oracle ~]# free – …

How to Clear System Cache in Linux In Linux, you can check memory status via commands, e.g., # more /proc/meminfo …

Need to monitor Linux server system performance? Try these built-in or bundled tools below. Most Linux distributions come equipped with a wealth of monitoring tools. These tools provide metrics that can be used to obtain relevant information and system activity. You can use these tools …

useradd
1. Purpose
The useradd command is used to create user accounts and create the user’s home directory, with superuser privileges required.
2. Format
useradd [-d home] [-s shell] [-c comment] [-m [-k template]] [-f inactive] [-e expire] [-p passwd] [-r] nam …