google上找到这个stackoverflow上的帖子,才知道Bash 4.0以上版本有更好的办法: 《How to convert a string to lower case in Bash?》 就是${parameter,,pattern},${parameter^^pattern}表达式,表达不会改变原来变量的值 #! /bin/bash # 注意:脚本第一行一定要注明脚本解释器是bash.不能是sh,或dash # 因为sh...
google上找到这个stackoverflow上的帖子,才知道Bash 4.0以上版本有更好的办法: 《How to convert a string to lower case in Bash?》 就是${parameter,,pattern},${parameter^^pattern}表达式,表达不会改变原来变量的值 代码语言:javascript 复制 #! /bin/bash# 注意:脚本第一行一定要注明脚本解释器是bash.不能...
Write a Bash script that converts all text in a file named "temp.txt" to lowercase. Code: #!/bin/bash# Check if the file existsif[!-f"temp.txt"];thenecho"Error: File 'temp.txt' not found."exit1fi# Convert text in "temp.txt" to lowercase and save the result to a temporary ...
-help) echo "convert a file(s) to uppercase from lowercase" echo "convert a file(s) from lowercase to uppercase" echo "will convert all characters according to the" ;; echo " specified command option." echo " Where option is" echo " -l Convert to lowercase" echo " -u Convert to ...
Convert text to lowercase using Bash shell scripting. How to capitalize first letter in bash?, If your version of bash is too old to support that extension (Like the OS X version), or you're using a shell like zsh that doesn't support it at all, you have to turn to … ...
In case you opt for using the Perl script, it will convert the case to lowercase automatically, eliminating the need to perform this action beforehand. Furthermore, callingfindis not necessary unless you wish to rename files in subdirectories as well, which the initial step does not cover. If...
This expansion modifies the case of alphabetic characters in parameter. The pattern is expanded to produce a pattern just as in pathname expansion. The ^ operator converts lowercase letters matching pattern to uppercase; the , operator converts matching uppercase letters to lowercase. ...
new_string=$(echo "$input_string" | tr -dc '[:alnum:]' | tr '[:upper:]' '[:lower:]'): Removes non-alphanumeric characters and converts the string to lowercase using the "tr" command. reversed_string=$(echo "$clean_string" | rev): Reverses the new string using the "rev" com...
In Linux and Unix systems, tr is a command-line utility that translates, deletes, and squeezes characters from standard input and writes the results to standard output. The tr command can remove repeated characters, convert uppercase to lowercase, and perform basic character replacing and removin...
downcase-word (M-l) Lowercase the current (or following) word. With a negative argument, do the previous word, but do not move point. capitalize-word (M-c) Capitalize the current (or following) word. With a negative argument, do the previous word, but do not move point. Killing and ...