comcast nr

awk commandawk, like SED, is a streaming editor that operates on lines in the document, one line at a line. Awk is more powerful than SED, and it can do what sed can do. The awk tool is actually very complex and has special books to describe its use.1 awk Command Formawk [-f|-f|-v] ' begin{}//{command1; Command2} end{} ' file[-f|-f|-v] Large parameter,-F specify delimiter,-F call script,-v define variable Var=value' Reference code block 'BEGIN Initializes a block of code, primarily referencing g

a length of 4096. A small module below can read the value of Pidhash_shift.-------------------------------------------------------------------------------------------- 1 #include 2 #include 3 #include 4 #include 5 #include 6 #include 7 cat/proc/kallsyms | grep pidhash_shift 8 unsigned int *p_shift = (unsigned int *) 0xc176ab0c; 9 Ten static int __init hash_size_init (void) 11 { ---printk ("Pidhash_shift----------------->%u\n", *p_shift); ---return 0; 14}

interrupt function, which is essentially initializing an array of elements void Open_softirq (int nr, void (*action) (struct softirq_action*), void *data) {//NR is the soft interrupt vector number Softirq_vec[nr].data = data; Softirq_vec[nr].action = action; } Where the kernel registers

|uniq-c |sort-nr | head-207, sed another usage finds the current line, and then modifies the parameter following the line: Sed-i '/selinux/s/enforcing/disabled/'/etc/selinux/configsed colon sed-i ' s:/ Tmp:/tmp/abc/:g ' test.txt means to change/tmp to/tmp/abc/. 11. Print out the maximum and minimum value of a file: Cat a.txt |sort-nr|awk ' {}end{print} nr==1′cat

being processedawk ' {if (argind==1) {print $} if (argind==2) {print $}} ' aaa.txt Bbb.txt # First scan the AAA file and then scan the BBB fileNR number of records that have been readawk ' Nr==1,nr==5{print} ' Aaa.txt # shows 1 to 5 lines of aaa.txt filesFNR the number of records in the current fileawk ' Nr==fnr{print ' a '}

determine whether the size is greater than 90, if more than 90 send mail alarmWhile sleep 5mDoFor i in ' df-h |sed-n '//$/p ' |awk ' {print $ ' |sed ' s/%//g 'DoEcho $iIf [$i-ge];thenecho "More than 90% Linux for disk space, please linux SA Check linux disk!" |mail-s "Warn linux/parts is $i%" [EMA Il protected]FiDoneDoneAnnotations: Using while ...; Do ...; Done is a while loop, and for, while, until, if, and conditional statements can refer to the following articles: http://www.cnblogs.com/che

commands, functions, and expressions, separated by a newline or semicolon, and enclosed in curly braces. There are four main parts: ? Variable or array assignment ? Output command ? Built-in functions ? Control Flow Command 4. awk 's environment variablesTable 1. AWK's environment variables Variable Describe $n The nth field of the current record, separated by FS between the fields. $ The complete input record. ARGC

environment variable Table 1. AWK environment Variables Variable Describe $n The nth field of the current record, separated by FS between the fields. $ The complete input record. ARGC The number of command-line arguments. Argind The location of the current file in the command line, starting at 0. Argv An array that contains the command-line arguments.

IP address: Cat access.log |awk ' {print $} ' |sort|uniq-c |sort-nr | head-207, sed another usage finds the current line, and then modifies the parameter following the line: Sed-i '/selinux/s/enforcing/disabled/'/etc/selinux/configsed colon sed-i ' s:/ Tmp:/tmp/abc/:g ' test.txt means to change/tmp to/tmp/abc/. 11. Print out the maximum and minimum value of a file: Cat a.txt |sort-nr|awk ' {}end{print}

#include #defineMXN 1000000+1#defineMid (A, b) ((A+B) >>1)intRead () {intx=0, w=1; CharC=GetChar (); while(c'0'|| C>'9'){ if(c=='-') w=-1; C=GetChar (); } while(c>='0'c'9') {x= (x3) + (x1) + (C-'0'); C=GetChar (); } returnx*W;}intarr[mxn];unsignedintnum,q;structnode{intVal; intLeft,right;} node[ +*MXN];intROOT[MXN];intnode_num=-1, rtop=-1;voidUpdateintNow ) { intNl,nr; NL=Node[now].left; NR