execfd_number> file 表示将fd_number文件描述符指向的文件指向file作为输出文件。 如果直接在命令行中使用,则采用 $ <some_cmd> <redirection> 的语法。 『将正常输出和错误信息保存到日志文件,同时在终端输出』描述了一个这样的重定向链: 由于指向终端的fd只能通过复制stdout的fd得到,在重定向stdout之前,应该将它...
Copy standard input toeach FILE, and also to standard output. -a, --append appendtothe given FILEs, donot overwrite -i, --ignore-interrupts ignore interrupt signals -p diagnose errors writing tonon pipes --output-error[=MODE] set behavior onwriteerror. SeeMODEbelow --help display this help...
invoke the shellasa login shell.Options:-c,--configFILELoad specified config file-e,--exec Treat remaining argumentsasthe command to execute-h,--hold never|start|error|always Keep window open after command
cat << EOF cat > /path/to/somefile << EOF [root@localhost ~]# cat > /tmp/test.out << EOF > Hello > World > EOF [root@localhost ~]# cat /tmp/test.out Hello World 管道: echo $PATH | tr 'abc' 'ABC' tee命令:read from standard input and write to standard output and files ...
and modification times of each FILE to the current time.A FILE argument that does not exist is created empty, unless -c or -his supplied.A FILE argument string of - is handled specially and causes touch tochange the times of the file associated with standard output.Mandatory arguments to ...
--icon FILE[,IX] Load window icon from file, optionally with index -l, --log FILE|- Log output to file or stdout --nobidi|--nortl Disable bidi (right-to-left support) -o, --option OPT=VAL Set/Override config file option with given value -B, --Border frame|void Use thin[表情...
ShellCheck.netis always synchronized to the latest git commit, and is the easiest way to give ShellCheck a go. Tell your friends! From your terminal Runshellcheck yourscriptin your terminal for instant output, as seen above. In your editor ...
# File: letsread.sh echo "Type in a string and then press Enter:" read response echo "You entered: $response" Now let’s run this script: bashletsread.sh ## Type in a string and then press Enter: ## Let’s typeHello!into the console, then press enter: ...
{shell:zsh binName:cliapp output:auto-completion.zsh} Now, will write content to file auto-completion.zsh Continue? [yes|no](default yes): y OK, auto-complete file generate successful 运行后就会在当前目录下生成一个auto-completion.{zsh|bash}文件, shell 环境名是自动获取的。当然你可以在运行时...
/usr/bin/env pythonfrom __future__ import print_functionimport sysprint("#stdout", file=sys.stdout)print("#stderr", file=sys.stderr)for line in sys.stdin: print(line, file=sys.stdout)EOF# 重定向可以到输出，输入和错误输出。python hello.py < "input.in"python hello.py > "output.o...