linux shell script if regular expression
That is, you can define a regex in bash matching the format you want. This way you can do: [[ $date =~ ^regex$ ]] && echo "matched" || echo "did not match". ,The first one doesn't match because it matches only the filename, but not the ... The BashGuide has a great article about the different types of patterns in Bash. ,You can use this equivalent script in /bin/sh : if uname | grep -Eq '(QNX|qnx)'; then printf "what is the dev prefix to use? " read dev_prefix if echo "$dev_prefix" ... ,POSIX shell doesn't have a regular expression operator for UNIX ERE or PCRE. ... You didn't tag the question bash , but if you do have that shell you can do ... ,There are a couple of important things to know about bash's [[ ]] construction. The first: Word splitting and pathname expansion are not performed on the words ... , If the regular expression is syntactically incorrect, the conditional expression's return value is 2. If the shell option nocasematch is enabled, the ..., The Unix tool to match a string against a regexp is expr : if expr "$maddr" : '..*@.*-...' > /dev/null; then... (note that expr regexps are implicitly ...,if you're using bash, try =~ : ... if [[ $line =~ ^End ]]. Note that the following will NOT work:1 if [[ "$line" =~ "^End" ]]. ,When using a glob pattern, a question mark represents a single character and an asterisk represents a sequence of zero or more characters: if [[ $gg ...
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 linux shell script if regular expression 相關參考資料
Check if a string matches a regex in Bash script - Stack Overflow
That is, you can define a regex in bash matching the format you want. This way you can do: [[ $date =~ ^regex$ ]] && echo "matched" || echo "did not match". https://stackoverflow.com How to check if a file name matches regex in shell script - Stack ...
The first one doesn't match because it matches only the filename, but not the ... The BashGuide has a great article about the different types of patterns in Bash. https://stackoverflow.com How to write and match regular expressions in binsh script ...
You can use this equivalent script in /bin/sh : if uname | grep -Eq '(QNX|qnx)'; then printf "what is the dev prefix to use? " read dev_prefix if echo "$dev_prefix" ..... https://stackoverflow.com Regex and if in shell script - Stack Overflow
POSIX shell doesn't have a regular expression operator for UNIX ERE or PCRE. ... You didn't tag the question bash , but if you do have that shell you can do ... https://stackoverflow.com Regex matching in a Bash if statement - Stack Overflow
There are a couple of important things to know about bash's [[ ]] construction. The first: Word splitting and pathname expansion are not performed on the words ... https://stackoverflow.com regular expression - Using regex inside if clause in bash - Unix ...
If the regular expression is syntactically incorrect, the conditional expression's return value is 2. If the shell option nocasematch is enabled, the ... https://unix.stackexchange.com shell script - Condition string matches reg.expression - Unix ...
The Unix tool to match a string against a regexp is expr : if expr "$maddr" : '..*@.*-...' > /dev/null; then... (note that expr regexps are implicitly ... https://unix.stackexchange.com Shell Scripting: RegEx in if Statement - Stack Overflow
if you're using bash, try =~ : ... if [[ $line =~ ^End ]]. Note that the following will NOT work:1 if [[ "$line" =~ "^End" ]]. https://stackoverflow.com use regular expression in if-condition in bash - Stack Overflow
When using a glob pattern, a question mark represents a single character and an asterisk represents a sequence of zero or more characters: if [[ $gg ... https://stackoverflow.com |