反斜线,反斜杆(escape [backslash])。 \1. 放在特殊符号之前,转义特殊符号的作用,仅表示特殊符号本身,这在字符串中常用; \2. 放在一行指令的最末端,表示紧接着的回车无效(其实也就是转义了Enter),后继新行的输入仍然作为当前指令的一部分。 10. ` 反引号/后引号-命令替换 反引号,后引号(Command substitution...
3.1.2.1 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 ofnewline. If a\newlinepair appears, and the backslash itself is not quoted, the\newlineis treated as a line continuatio...
Let’s break down what’s going on in the Bash script you just created. Bash executes programs in order from the first line in your file to the last line. Theexprcommand can be used toevaluateBashexpressions. An expression is just a valid string of Bash code that, when run, produces a...
/bin/bash #Declare bash string variable BASH_VAR="Bash Script" # echo variable BASH_VAR echo $BASH_VAR #when meta character such us "$" is escaped with "\" it will be read literally echo \$BASH_VAR # backslash has also special meaning and it can be suppressed with yet another "\"...
rsync,ssh: do not overescape spaces in remote filenames (#910) (e8dc253) source files using absolute paths for absolute BASH_SOURCE (e1a70c6) tar: Complete added files with long opts (c94bebb) update-alternatives: fix the "--help" parsing (07605cb)2.14...
ESCAPE序列 与流行的看法相反,使用原始逃逸序列没有问题。使用tput与手动打印相同的ANSI序列的摘要。更糟糕的是,tput实际上并不便携。有许多tput变体,每个变体都有不同的命令和语法(尝试tput setaf 3使用FreeBSD系统)。原始序列很好。 文字颜色 注意:需要RGB值的序列仅适用于真彩色终端仿真器。
The special parameters * and @ have special meaning when in double quotes (see PARAMETERS below). Words of the form $'string' are treated specially. The word expands to string, with backslash-escaped characters replaced as specified by the ANSI C standard. Backslash escape sequences, if ...
' # Singlequote closed by apostrophe echo 'Don\'t try this at home'# Attempting to escape ' in ''echo'Path is $PATH'# Variables in single quotestrap"echo Took${SECONDS}s"0# Prematurely expanded trapunsetvar[i]# Array index treated as glob...
Check If Boolean Is True in Bash Round to 2 Decimal Places in Bash Check If Output Contains String in Bash Bash Remove Spaces from String Get Last Word in Each Line in Bash sed Remove Line Containing String Get Text Between Two Strings in Bash Bash Escape Single Quote Remove Double Quotes...
2 category=minerals # No spaces allowed after the "=". 注意:不要和"="test操作符混淆. 1 # = as a test operator 2 3 if [ "$string1" = "$string2" ] 4 # if [ "X$string1" = "X$string2" ] is safer, 5 # to prevent an error message should one of the variables be empty...