2018年5月22日 · The regular expression ^[0-9]+$ will match a non-empty contiguous string of digits, i.e. a non-empty line that is composed of nothing but digits. If you want to use that …

2018年1月2日 · This depends on how you define a digit; [0-9] tends to be just the ASCII ones (or possibly something else that is neither ASCII nor a superset of ASCII but the same 10 digits as …

2010年12月15日 · The regular expression ^[0-9]+.+[0-9]$ is a POSIX extended regular expression that matches one or more digits at the start of the line, followed by one or more other …

find . -maxdepth 1 -regex '\./.*[^0-9][0-9]\.txt' Find is recursive by default, but ls is not. To only find files in the current directory, you can disable recursion with -maxdepth 1. Find matches against …

2014年8月22日 · This works on arrays too, incl $@: params=("${@##*[!0-9]*}")-- Keep all positional arguments, but only use numbers - anything else will be converted to null string …

2014年8月28日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …

$ sed 's/^.*\(%[0-9]\+\).*$/\1/' input Assuming that a line contains at most one of those %123 tokens and that every line contains such a token. The \( \) meta character mark a match-group …

2018年11月30日 · grep -x -E '[0-9]+' or. grep -x -E '[[:digit:]]+' This would extract any line that contained only digits. The -x option to grep forces the pattern to match across a complete line. …

2017年11月1日 · It seems that you are running Centos 7. When issuing the command strings /usr/lib/libstdc++.so.6 | grep GLIBCXX in Centos 7, it shows the following output:

2014年6月14日 · To get OS and VER, the latest standard seems to be /etc/os-release.Before that, there was lsb_release and /etc/lsb-release.