Using eval Command Use the eval command to run a string as a command in Bash Use eval command 1 2 3 eval "echo Hello, world!" Output 1 2 3 Hello, world! In the above code, the eval command evaluates and executes the arguments passed to it as a Bash command. The argument ...
@Test public void testExecShellFail() throws IOException { String cmd = "ls -lash /pwd"; Process exec = Runtime.getRuntime().exec(cmd); // 读取输出流: 读取命令执行后的输出结果 InputStream inputStream = exec.getInputStream(); byte[] bytes = new byte[1024]; int len = 0; System....
An understanding of Bash starts with an understanding of Bash syntax. After you know the syntax, you can apply it to every Bash command you run.The full syntax for a Bash command is:Bash Copy command [options] [arguments] Bash treats the first string it encounters as a command. The ...
sudo commandSome Bash commands can only be run by the root user; a system administrator or superuser. If you try one of these commands without sufficient privileges, it fails. For example, only users logged in as a superuser can use cat to display the contents of /etc/at.deny:Bash ...
(sh-env COMMAND)- Run a bash command string in the current shell, modifying current env, and return the stdout result (useful forexport,sourceetc.). Interop (env [KEY] [VALUE])- See above section. (sh! COMMAND [ARGS])- See above section. ...
OPTIONS In addition to the single-character shell options documented in the description of the set builtin command, bash inter- prets the following options when it is invoked: -c string If the -c option is present, then commands are read from string. If there are arguments after the string...
The container is created with this Dockerfile and started with the following command: $ x11docker --sudouser -c --hostnet --desktop --init=systemd -- --cap-add=IPC_LOCK --security-opt seccomp=unconfined -- hongyi-zhao/deepin-wine startdd...
nohup command & 之后直接关闭终端的话，会发现之前已经启动进程也会退出。 解决办法： nohup command &...
类似echo "who am I: $USER",如果没有双引号,$USER 输出可能就为空;$USER 是一个内置变量; IFS:Internal Field Separator,Input Field Separator; The default value of IFS is space, tab, newline. (A three-character string.) 在shell 脚本中,一般没有必要修改 IFS。 Arithmetic expansion$...
Using the source command to run the script in current shell By default, a shell script runs in a subshell. Sometimes, you may want to run the script in the same shell itself. That's where the source command comes in. With this command, you include something into the same shell. This ...