一个命令例子, 定时1秒从 eastmoney.com 读取一组股票数据, 用 awk 提取响应字符串中圆括号中的 JSON 部分, 然后用jq解析, 提取其中的 f2, f3 两个字段 watch -n 1"curl -s -XGET \"https://push2.eastmoney.com/api/qt/ulist.np/get?fltt=2&np=3&ut=8dec03ba335b81bf4ebdf7b29ec27d15&invt...
引用网址:https://appuals.com/list-linux-commands-shell-knows/#:~:text=Method%201%3A%20Listing%20Commands%20With%20the%20compgen%20Shell,extremely%20broad%20idea%20of%20what%20a%20command%20is. There’s actually a command to list all other commands that a Linux shell knows, but more th...
至11天结束, 那24小时内的文件, 将其删除find/appdata/tl_info-mtime10-name"*.*"-execrm-rf{}\;# 当前时间往前推10天之前, 大于3000KB的文件(目录不算), 将其清空find/appdata/cnlist-mtime+10-typef-size+3000k-execcp/dev/null{}\
There’s actually a command to list all other commands that a Linux shell knows, but more than likely you’re not familiar with it. If there’s ever been a counterintuitive Catch-22 in regards to using GNU/Linux-based operating system command lines, then this is it. That being said, it...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 function function_name () { list of commands [ return value ] } 函数的调用 Shell 函数返回值只能是整数,一般用来表示函数执行成功与否,0表示成功,其他值表示失败。如果 return 其他数据,比如一个字符串,往往会得到错误提示:numeric argument required。 如果...
commands done 在list参数中,你需要提供迭代中要用到的一系列值。在do和done语句之间输入的命令可以是一条或多条标准的bash shell命令。 1.1 读取列表中的值 for命令最基本的用法就是遍历for命令自身所定义的一系列值。 #!/bin/bash # basic for command ...
监视Linux服务的脚本 我们的shell脚本应该看起来像。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #!/bin/bash# This script iterates over a listofservices and # is used to determine whether they are running or not.forservicein$(cat myservices.txt);dosystemctl status $service|grep--quiet...
下载Linux镜像(这里以centos7为例) —>官网下载入口 打开VirtualBox,点击新建,输入名称、类型和版本 4. 分配内存大小 5. 创建虚拟硬盘 6. 选择第一个 7. 选择动态分配 8. 选择位置和大小 9. 创建之后,选择设置 —> 存储,选择盘片 10. 设置网络,选择桥接网络 ...
Commands aliasing Aliases are nicknames given to a given command. Syntax: alias nickname="original command name", example: alias cls=clear. Spaces are not allowed before and after the = symbol. To list the existed aliases: alias, to delete a given alias: unalias cls, to delete all aliases...
Commands aliasing Aliases are nicknames given to a given command. Syntax: alias nickname="original command name", example: alias cls=clear. Spaces are not allowed before and after the = symbol. To list the existed aliases: alias, to delete a given alias: unalias cls, to delete all aliases...