MySQL数据库官方文档：https://dev.mysql.com/doc/refman/5.7/en/server-logs.html 一、MySQL日志分...
# Default runlevel. The runlevels used are: # 0 - halt (Do NOT set initdefault to this) # 1 - Single user mode # 2 - Multiuser, without NFS (The same as 3, if you do not have networking) # 3 - Full multiuser mode # 4 - unused # 5 - X11 # 6 - reboot (Do NOT set in...
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中文字", len = strlen(str); int utf8CharLen; for (int i = 0, utf8CharLen; i < len; i += utf8CharLen) { utf8CharLen = BYTE_WIDTH_UTF8(str[i]); printf("str[%d] is a word character with %d bytes\n", i, utf8CharLen); } */ unsigned char mblen_table_utf8[] = { ...
Like most Unix shells, it supports filename globbing (wildcard matching),piping, here documents, command substitution, variables, and control structures for condition-testing and iteration. Other features, e.g., history, are copied from csh and ksh. Bash is aPOSIX-compliant shell, but with a...
for ( variable assignment; condition; iteration process) { statement1, statement2, ...} for (i in array) {statement1, statement2, ...} 遍历数组下标switch(expression){case VALUE or /REGEXP/:tatement1,statement2,...default: stat1, ...} 内置函数: split(string, array [, fieldsep [,...
print"$n does not exist in the array.\n"; } #Search the range of numbers @search_result=grep{$_>25&& $_<=50}@numbers; print"The list of numbers less between 25 to 50 are:\n@search_result\n"; Output: The following output appears after executing the script with the number 23: ...
Using grep -e option you can pass only one parameter. Use multiple -e option in a single command to use multiple patterns for the or condition. grep -e pattern1 -e pattern2 filename For example, grep either Tech or Sales from the employee.txt file. Use multiple -e option with grep ...
You can completely do away withgrep. if /opt/reds/recycle.sh status >/dev/null; then echo running else echo not running fi A script that is written accurately can include an option labeled as--queryor something similar such as--quiet,--silent, or--scriptthat permits its utilization in ...
Think of the situation searching, say, ' PATTERN ' with this condition. Matched area includes surrounding spaces, and satisfies both conditions partially. This match does not occur when option --strict is given, either.CHARACTER CODE--icode=code Target file is assumed to be encoded in utf8 ...