获取当前正在运行的bash进程的版本 # As a string. "$BASH_VERSION" # As an array. "${BASH_VERSINFO[@]}" 打开用户首选的文本编辑器 "$EDITOR" "$file" # NOTE: This variable may be empty, set a fallback value. "${EDITOR:-vi}" "$file" 获取当前函数的名称 # Current function. "${FUNC...
How to Run Linux Commands in Background Published on Nov 1, 2019• 4 min readTypically when you run a command in the terminal, you have to wait until the command finishes before you can enter another one. This is called running the command in the foreground or foreground process. When ...
Run Linux Command or Process in Background If a process is already in execution, such as thetar command examplebelow, simply pressCtrl+Zto stop it then enter the commandbgto continue with its execution in the background as a job. You can view all your background jobs by typingjobs. Howev...
Unlike the previous commands, usingnohupallows you to run a command in the background and keep it running. How?nohupbypasses the HUP signal (signal hang up), making it possible to run commands in the background even when the terminal is off. Combine this command with redirection to “/dev...
Suppose you have a long-running task (for example, compiling a large program) that you need to run, but you also want to get some other work done. Linux lets you start a task in the background and keep on doing other things from the command prompt. We wi
inside the terminal window, using the standard terminal I/O interface. GUI editors start their own window and present their own interface, independent of terminals. Emacs runs in a GUI by default but will run in a terminal window as well. 注意 编辑文本是你首次开始看到终端和图形界面之间差异的...
Putting it all together, you get something like “ls tried to open /dsafsda but couldn’t because it doesn’t exist.” This may seem obvious, but these messages can get a little confusing when you run a shell script that includes an erroneous command under a different name. ...
should usually have the complete directory anyway. But in case it doesn’t, this can be a quick command to see the directory that you’re in. Another application of this command is when creating scripts where this command can allow us to find the directory where the script has been saved...
Continuing in background, pid 237616. Output will be written to ‘wget-log’. sleep 命令 -- 休眠 wc命令-- 统计文件中的行数、单词数或字节数 wc 命令用来统计文件中的行数、单词数或字节数,然后将结果输出在终端上。我们可以使用 wc 命令来计算文件的Byte数、字数或是列数。
你可以使用chsh命令来更改你的Shell(例如ksh或tcsh),但请记住,本书假设你正在运行bash。 2.7 Dot Files(点文件) Change to your home directory, take a look around with ls, and then run ls -a. Do you see the difference in the output? When you run ls without the -a, you won’t see the ...