2. Run multiple commands using AND (&&) operator 💡 When you chain multiple commands with&&, the second command will only be executed if the first runs with no errors. If you want to run multiple commands in such a way that if one of the commands returns an error, the later part of...
command 1; command 2; … command N For instance: Just enter the following three commands in one line, separated by semicolons. This will show you the login name(whoami), check which directory you’re currently in( pwd ), and how long the system has been running(uptime). whoami; pwd;...
you’ll need to change the configuration (see 5.5.2 GRUB Configuration), but for now, let’s go one step deeper and examine some GRUB internals with the commandline interface.
The router is also connected to the Internet—the cloud in the figure. Because the router is connected to both the LAN and the Internet, all machines on the LAN also have access to the Internet through the router. One of the goals of this chapter is to see how the router provides this...
原文发于我的独立博客:通过《The Linux Command Line》入门linux命令行 此书网站:The Linux Command Line,它是免费的。 它有中文版,而且还有一个好听的名字:快乐的 Linux 命令行 学习有两种方法,一种是系统的学,一种是根据实际需求来学。两种各有优缺点,前一种,知识不会有缺漏,对日后的融会贯通和触类旁通有...
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When you run this command, cat prints the contents of file1, file2, and any other files that you specify (denoted by ...), and then exits. The command is called cat because it performs concatenation when it prints the contents of more than one file. 当你运行这个命令时,cat会打印文件1...
18. Run a mini calculator This function defines a quick calculator on the command line with variable precision (the default is 2). It usesbc. Create the function like this: $functionqqbc(){echo"scale=${2:-2};$1"|bc-l Next, perform a quick calculation: ...
Run a Command Multiple Times in Linux using a while Loop Related to the previous method, awhileloop can also be used to run a command many times in Linux using the following syntax: $ i=1; while [ $i -le n ]; doyourCommand_here; i=$(($i++)); done ...
However, when it comes to executing multiple operations, running commands one by one isn't efficient. A faster way to do it is to chain multiple commands in one line. Not only does this speed up the process, but it also saves you time. Let's explore all the ways to run multiple comm...