After running the above command in which, we specified the cut command to just print the first field of the file using the delimiter “:”. Conclusion Today we introduced you to the Linux command “cut” which is used to cut some part of the specified portion of any file. After giving ...
index=$(echo $arg | cut -f1 -d=) val=$(echo $arg | cut -f2 -d=) case $index in X) x=$val;; Y) y=$val;; *) esac done ((result=x+y)) echo "X+Y=$result" Run the file with bash command and with two command line arguments. $ bash command_line_names X=45 Y=30 ...
Shell command lines are extremely useful in your daily work as data scientists. There are many more examples and use cases that could be explored. And as you will see there are often always different ways to achieve a particular result using a wide range of available shell commands and relate...
$HOME: 指向用户目录,符号~表示当前用户目录 关于sudo 执行时,虽然用 root 权限,但此时 $HOME 并不是/root/目录,可以通过 sudo -Hcommand使用 root 权限同时 $HOME 值为 "/root/" 常用管道重定向 delimiter 是一个标记符,原则上是随意,但一般使用EOF cat<<EOF Hello, my friend. Bye. EOF 个性化配置 其...
mancommand l.df 显示磁盘使用情况。 m.du 显示文件名中文件和目录的磁盘使用情况(du -s只给出一个总数)。 dufilename n.last 列出您最后登录的指定用户。 last yourUsername o.ps 列出您的进程。 ps -u yourusername p.kill 使用您所提供的ID杀死(结束)进程。
If you want to learn the fundamentals of bash scripting, read this article to find 25 bash scripting examples.
experience, I’ve written Bash 101 Hacks eBook that contains 101 practical examples on both Bash command line and shell scripting. If you’ve been thinking about mastering Bash, do yourself a favor and read this book, which will help you take control of your Bash command line and shell ...
Ctrl+L– clears the screen (same effect as the “clear” command). Ctrl+S– pause all command output to the screen. If you have executed a command that produces verbose, long output, use this to pause the output scrolling down the screen. ...
Some examples: Programming language linting: Python (syntax, pep8, byte-compiling, reliance on asserts which can be disabled at runtime, except/pass etc.) Perl Java Scala Ruby Bash / Shell Misc (whitespace, custom code checks etc.) Build System, Docker & CI linting: Make Maven SBT Gradle...
The HOME/bin directory contains shortcut commands that automate and ease using the command line. Some of these commands are listed here: * Command 'csystemctl' replaces systemctl with https://github.com/TermuxArch/docker-systemctl-replacement, ...