"/some/path/../../another/path/script" "./some/folder/script" 或者,如果bash脚本本身是一个相对符号链接,你想跟随它并返回链接到脚本的完整路径: pushd . > /dev/null SCRIPT_PATH="${BASH_SOURCE[0]}"; if ([ -h "${SCRIPT_PATH}" ]) then while([ -h "${SCRIPT_PATH}" ]) do cd ...
--rcfile file Execute commands from file instead of the standard personal initialization file ~/.bashrc if the shell is interactive (see INVOCATION below). 译:在交互式shell中,会读取~/.bashrc文件,如果有这个选项,则读取--rcfile后面的file --login Equivalent to -l. --noediting Do not use the...
/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...
Finished processing the file $ 标准文件描述符: 对终端界面来说,标准输入是键盘。标准输出就是终端显示器。 $ ls -al test test2 test3 badtest 2> test6 1> test7 $ cat test6 ls: cannot access test: No such file or directory ls: cannot access badtest: No such file or directory $ cat te...
symbol is between curly brackets ({ }), but that’s only in very specific situations). The pound symbol allows you to makecommentsin your code which you can use to annotate code so that another human being who is reading your code can understand how your program is designed to function....
# use predefined variables to access passed arguments #echo arguments to the shell echo $1 $2 $3 ' -> echo $1 $2 $3' # We can also store arguments from bash command line in special array args=("$@") #echo arguments to the shell ...
Use thedown arrowkey to move the cursor down to the line below the “Defaults…FALSE” line and pressReturn. In the new line created type } Then pressReturn. Type function show_all PressReturnand type { Use thedown arrowkey to move the cursor below the “Defaults…TRUE” command. (If ...
The exit status of a function definition is zero (success) unless another read-only function with a similar name already exists or a syntax error occurs. How to define and use functions in Bash? You can define functions in your .bashrc file with your other bash alias. In a shell script,...
Let’s create another script,verify.sh. If we needed to access the function from another bash script, we could achieve that using the source command. You first source the name of the file. Once that is done, you can proceed to use functions from the other script on the current script....
Define a Function to Read from a File Define a Function to Write into a File Define a Function to Read a Reference Argument Define and Call a Function The method of declaring a simple function and calling the function in the Bash script is shown in the following script. The function prints...