ASCII character with octal (base-8) value n, where n is 1 to 3 digits /0nnn: 用8进制的值表示一个字符,例如/0101,即65,表示字符’A’(The eight-bit character whose value is the octal (base-8) value nnn where nnn is 1 to 3 digits ) /xHH: 用16进制的值表示一个字符,例如/x41,即65...
A Note About Bash Escape Character A non-quoted backslash \ is the Bash escape character. It preserves the literal value of the next character that follows, with the exception of newline. If a \newline pair appears, and the backslash itself is not quoted, the \newline is treated as a ...
Using the${parameter//pattern/replacement}syntax, Bash performs a replacement operation over a variable. Here, the pattern is a character group consisting of the single, double, and backtick characters, while the replacement is the empty string. The double forward slashes right aftervarindicate tha...
metacharacter A character that, when unquoted, separates words. One of the following: | & ; ( ) < > space tab 另外对于表1和表2中的特殊字符,如果我们想让其变成普通字符,就需要使用转义符,shell中提供三种转义符,如表3所示。 There are three quoting mechanisms: the escape character, single quotes...
通过exec bash-l 或者 exec /bin/bash -l 或者 exec $SHELL -l 去打开一个新进程。 注: exec 会导致 exec 之后的语句不执行,exec 一般放于脚本末尾。 3、jq(json 解析工具) (1)基本概念 jq 是一款在使用命令行处理 JSON 数据的工具,可用于处理 标准输入、管道、文件 传递的 JSON 数据,经过一系列 过滤...
转义字符的英文为Escape character。原本是指ASCII中的十进制27,十六进制1D,八进制033所定义的那个字符。对应于标准键盘左上角的ESC键。老式键盘如果没有ESC键,替代输入是“Ctrl+[”。在老式的计算机外设控制协议,ASCII码的十进制27这个字符开始的一个字符序列,是外设的控制序列,不能按照这些字符的字面意义解释。后来...
-bash: /dev/tcp/127.0.0.1/223: 拒绝连接 #223接口不存在,打开失败 [chengmo@centos5 shell]$ exec 8/dev/tcp/127.0.0.1/22 [chengmo@centos5 shell]$ ls -l /proc/self/fd/ 总计 0 lrwx--- 1 chengmo chengmo 64 10-21...
[root@localhost~]# socat tcp-listen:1234,reuseaddr,fork exec:bash,pty,stderr 不用写一行代码。此时从另一个终端,我们便可以用telnet登录这个服务器: 代码语言:javascript 复制 [root@localhost~]# telnet127.0.0.11234Trying127.0.0.1...Connected to127.0.0.1.Escape character is'^]'.bash:此 shell 中无...
Escape Characters - Shell Scripting Tutorial How to enable linux support double backslashes “\” as the path delimiter - Stack Overflow shell - Backslash in Path - Unix & Linux Stack Exchange shell - Which characters need to be escaped when using Bash? - Stack Overflow ...
以下是man bash 得到的英文解析：metacharacter A character that, when unquoted, separates words. One of the following: | & ; ( ) > space tabcontrol operator A token that performs a control function. It is one of the following symbols: || & && ; ;; ( ) | 三、shell转义符...