In Linux, there areseveral types of commands, and for a new Linux user, knowing the meaning of different commands enables efficient and precise usage. Therefore, in this article, we shall walk through the variou
[me@linuxbox ~]$ echo "The balance for user $USER is: \$5.00" The balance for user me is: $5.00 It is also common to use escaping to eliminate the special meaning of a character in afilename. For example, it is possible to use characters in filenames that normally havespecial ...
In unix terminology, attyis a particular kind ofdevice filewhich implements a number of additional commands (ioctls) beyond read and write. In its most common meaning,terminalis synonymous with tty. Some ttys are provided by the kernel on behalf of a hardware device, for example with the input...
part of the test following the if or elif reserved words, part of any command executed in a&&or||list except the command following the final&&or||, any command in a pipeline but the last, or if the command,s return value is being inverted with...
Another good use of Zsh is the recursive search. You were used with Bash to the operator “*” meaning “all”. Now with Zsh, “**” can be translated “all within all”. In other words, recursive search. Let me illustrate with an example. If you want to delete a file named “foo...
PYTHONIOENCODING If this is set before running the interpreter, it overrides the encoding used for stdin/stdout/stderr, in the syntax encodingname:errorhandler The errorhandler part is optional and has the same meaning as in str.encode. For stderr, the errorhandler part is ignored; the handl...
Bourne shell scripts generally start with the following line, which indicates that the /bin/sh program should execute the commands in the script file. (Make sure that no whitespace appears at the beginning of the script file.) Bourne shell 脚本一般以下面一行开始,表示 /bin/sh 程序应执行脚本文...
[me@linuxbox ~]$ echo * Desktop Documents ls-output.txt Music Pictures Public Templates Videos 1. 2. So what just happened? Why didn’t echo print “*”? As you recall from our workwith wildcards, the “*” character means match any characters in a filename,but what we didn’t see...
Installation of explain.sh Utility in Linux We have to insert the below piece of code as it is in the~/.bashrcfile. The code should be inserted for each user and each.bashrcfile. It is suggested to insert the code to the user’s.bashrcfile only and not in the.bashrcof root user. ...
Shell built-in Commands: http://www.gsp.com/cgi-bin/man.cgi?topic=builtin 关于shell中的特殊符号: http://docstore.mik.ua/orelly/unix3/korn/ch01_09.htm Meaning of bash parameter used in Unix script: http://javarevisited.blogspot.com/2011/06/special-bash-parameters-in-script-linux.html ...