我一直在尝试使用具有多行字符串的环境变量替换/添加yaml中字段的值,使用以下语法 multi string"sed-i -e "s/^\(\s*key-in-yaml\s*:\s*\).*/\1 $replacewith/" somefile.yam 浏览187提问于2021-05-17得票数 1 3回答 从文件中获取值并将其保存到其他文件的Shell脚本 ...
e.g, grep "hello world" instead of grep hello world. And with shell script, ' doesn't expand variable so grep '\$VAR1' file1 literally search string $VAR1 in the file whereas grep "$VAR1" file1 expands the variable value and search that value in the file. ...
同大多数Linux命令一样,sed也是从stdin中读取输入,并且将输出写到stdout,但是当filename被指定时,则会从指定的文件中获取输入,输出可以重定向到文件中,但是需要注意的是,该文件绝对不能与输入的文件相同。 options是指sed的命令行参数,这一块并不是重点,参数也不多。 script是指需要对输入执行的一个或者多个操作指...
If you do not specify the label variable, control transfers to the end of the script. (2)wWFile Appends the pattern space to the WFile variable. (2)x Exchanges the contents of the pattern space and the hold space. (2)y/pattern1/pattern2/ Replaces all occurrences of characters in the...
基于@mklement0在本线程中的回答，以下工具将使用sed和bash将任何单行字符串（与regexp相反）替换为任何...
-F value 指定value(可以是字符串或正则表达式)为字段分隔符 -f scripfile.awk 从脚本文件中读取awk命令,允许使用多个-f选项 -v var=value 为程序变量var赋值,将外部变量传递给awk 面试时的重中之重是-F参数。 -F参数:指定分隔符,可指定一个或多个,可省略(默认空格或Tab制表符)。 指定一个分隔符,例如-F...
The substitute command changes all occurrences of the regular expression into a new value. A simple example is changing "day" in the "old" file to "night" in the "new" file: sed s/day/night/ <old >new Or another way (for UNIX beginners), sed s/day/night/ old >new ...
Any files created bysedare created with the CCSID specified byccsid. This option overrides the value of the QIBM_CCSID environment variable. -ecommand Append the editing commands specified by thecommandargument to the list of commands. -fcommand_file ...
can anyone use a variable string=20 and then use sed to get the job done I have tried sed but I have two problems 1- sed print the result on STDOUT but doesnot change the file! 2-it replace 10 with $string instead of 20(the value of string) ...
If file does not exist or cannot be read, sed treats it as an empty file. [a[,b]]s/reg/ sub/[gpn] [wfile] Substitutes the new text string sub for text matching the regular expression, reg. Normally, the s subcommand replaces only the first such matching string in each input line...