列转行(去除换行符 ): #cut-d: -f1 < /etc/passwd |sort| xargsecho 行转列: #echo"1 2 3 4 5"|xargs -n1 最长两列显示: #echo"1 2 3 4 5"|xargs -n2 创建未来十天时间: #seq1 10 |xargs -idate-d"{} days "+%Y-%m-%d 复制多个目录: #echodir1 dir2 |xargs -n1cpa.txt 清空所有...
Whether you’re completely new to Linux or have been using a Linux desktop for a long time, there are some commands that may not seem to make sense. This is especially true if you never dive into the command line, which is where much of the true power of Linux and other Unix-like o...
To display a variable useecho / printf command: $ echo $NOW A sample shell script #!/bin/bashNOW=$(date+"%m-%d-%Y")FILE="backup.$NOW.tar.gz"echo"Backing up data to /nas42/backup.$NOW.tar.gz file, please wait..."# rest of script#tarxcvf /nas42/backup.$NOW.tar.gz /home/ ...
Bash. The examples in this article use the Bash shell on Windows 10 for the curl commands. See Windows Subsystem for Linux Installation Guide for Windows 10 for installation steps. Other Unix shells work as well. The curl examples, with some slight modifications, can work on a Windows Command...
The standardized AWK programming language as implemented by awk, has been a staple in UNIX and Linux systems. In fact, because of how ubiquitous and reliable it has become through the years, many shell scripts use it. However, interoperability with some shell functions can pose challenges. In ...
echo"Hello,$(whoami)!" Copy Hello, taniarascia! User Input We declared a variable in the last example, but we can also have the user set the value of a variable dynamically. For example, instead of just having the script sayHello, World!, we can make it ask for the name of the pe...
In this article, we have looked at the cron program, cron expressions, and crontabs. We used thecrontabcommand to list and edit cron jobs. Crontabs are some of the best tools for Unix-like systems to automate repetitive tasks. What would you schedule with a cron job?
首先mac osx和linux都属于从unix系统演变而来的,那么博主当时学习linux的时候看的书是《UNIX环境高级编程》,那么这里隐含的一个意思就是,书里面的大部分posix接口都是可以用的,最简单的open read write也是可以用的,并且OC里面的有的开源串口库的底层写函数也是用的write,由此可见,大部分的OC库里面也大量的封装了...
ag --count test |: The Silver Searcher finds files containing matches to thetestpattern. Each file is listed with a count of the number of times the pattern matched in the file. fzf --preview "echo {} | cut -d: -f1 |: The Silver Searcher’s results are piped tofzf, which lays ...
}while[ 1 ]domenucase$optionin0)echo"exit code 0, 退出循环"break;; 1)echo"Display Disk Space"display_disk_space ;; 2)echo"Display Logged Users"display_logged_users ;; 3)echo"Display Memory Usage"display_memory_info ;; 4)echo"Display CPU Info"display_cpu_info ;; ...