L_jessica7227的博客

解决启动postgresql问题var/run/postgresql/.s.PGSQL.5432

postgreSQL的快速安装上手，以及更改数据文件夹路径

首先看一下warnning信息 WARNING: The script normalizer is installed in '/home/llxy/.local/bin' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.配置环境变量gedit ~/.bashrc# 在文件

简易上手的绘图工具–gnuplot首先声明，ubuntu20.04的环境,linux版本5.4.0安装就两行，很简单sudo apt-get updatesudo apt-get install gnuplot应用gnuplotset output "test.png"test利用文件绘制把数据存放在 data.dat文件中，如下：#seg freen usedn0 0 8192 1 511 7681 2 189 8003 3 850 7342 4 842 7350

在shell命令行 传文件到c语言中的main函数，函数的运行结果传输到文件中，excel也可以哦~方便画图

use argmentsWhen we want to use some argments from source program to our program, if the argment define to simple, like “int arg;” you just find and copy them from source program,custom data typeand if the argment have a custom data type such as “ext2_f

实现find shellstruct statstruct direntint res = stat(file_path,&st_buf)res == 0;successres != 0;faild，errno为错误信息S_ISDIR(struct stat st_buf)S_ISREG()map<string,int>mymapmymap.countDIR *d_info = opendir()struct dirent pdirent = readdir()

解决ubuntu软件中心无法安装软件的方法当用ubuntu软件下载中心安装某个软件的时比如我安装typora的时候报错“unable to install typora: status-code=409 kind=snap-change-conflict message=snap"typora"has "install-snap"change in progress不用担心，打开终端，查看当前的状态:~$ snap changesID Status Spawn