Shell

Copy Code code as follows: #include #include int main () { Char castdoutline[1024]; One line of information in the standard output of the PS command char* pctmp = NULL; A string that points to a space split Char caselfpid[10]; PID

Copy Code code as follows: #include #include #include #include int main (int argc,char **argv) { int mode; int Mode_u; int mode_g; int mode_o; Char *path; if (argc{ printf ("%s \n", argv[0]);; Exit (0); }

1. Preface Time is very important to the operating system, from the kernel level to the application layer, the time expression and precision of the same. The Linux kernel uses a constant named Jiffes to compute the timestamp. Application layer has

Function: Copies the specified input file to the specified output file, and can be converted to format during the copy process. You can use this command to realize the function of the diskcopy command under DOS. First use the DD command to write the

Xargs is a filter that passes parameters to a command and is a tool for combining multiple commands. It divides a data stream into small enough chunks to facilitate the processing of filters and commands. Typically, Xargs reads data from pipes or

Set exers = objWS. Exec ("Pscp-r-scp-pw" & Password & "" & loginID & "@" & Host & ":" & Data_path & Filen Ame & "" & Windows_path)But inTestOfWhenWait, be handcuffed.BayesianThe file thanMoreBig, cuff.Longer shell timeOfWhenWait on theIsCmdWindow

1. Use of time-related random numbers Generate output Unixtimestamp (%s) and current time nanosecond data (%N, accurate to one-seconds) using the data command. ) The former ensures that the output does not repeat in different seconds, and that the

1, the simplest way Copy Code code as follows: : .... Comment Content Block The input is redefined to the previous command, but: it is an empty command, so it is equivalent to a comment.If a command with an inverted

In the process of doing keyword cleaning, you need to filter out a class of words that do not conform to the end of a word, the idea is to put this batch of words according to the last word sort, so think of the first of these words to reverse, such

Learn to use shell analysis log only one morning!!! Many places to share the log analysis of the shell script, but basically did not say the specific meaning of each command, learning cost is very high, summed up here, to facilitate the quick start.

Copy Code code as follows: #!/bin/bash function Pinghost { Ping $1-c 1-w |grep rtt|cut-d "/"-f6 } Tmp_fifofile= "/tmp/$.fifo" # script runs the current process ID number as filename Mkfifo $tmp _fifofile # Create a new random FIFO pipeline

Sometimes when we process and view files, there are often a lot of empty lines, in order to be beautiful or need, it is necessary to remove these lines, the following methods: 1) with the TR command Copy Code code as follows: Cat

One of my colleagues once asked me this question: how do I delete all files in the directory except some files under Linux? At the time, I told him that he could solve it by pattern matching. But in fact, besides, there are other methods, which are

Verifying IP address legality using the shell How to use: Copy Code code as follows: [Root@yang python]# bash check_ip.sh IP address Execution Result: The return value of 0 checksum is valid, not 0 illegal. Shell code: Copy

Copy Code code as follows: #!/bin/bash : Transcoding tool, support UTF-8 turn GBK and GBK to UTF-8Kong Lingfei @2012-05-07Mark #set-X Scode= "GBK"Dcode= "Utf-8" function Usage (){Cat Usage:conv [OPTIONS] [DIR][-u] GBK to UTF-8[-G] UTF-

The Linux terminal executes to delete the invalid link file. Copy Code code as follows: #!/bin/sh Usage (){echo "Removebroken 0.1, a shell script to remove broken link files."echo "License:mit, (c) Chenzhiqiang"echo "Usage:"echo "$--

Copy Code code as follows: #!/bin/bash Path=/bin:/sbin:/usr/bin:/usr/sbin Export PATH I=1 While [$i-lt] #硬盘数量, 12 blocks apart from the system disk Todo J= ' echo $i |awk ' {printf '%c ', 97+ $i} ' #系统盘是sda, if the other needs to modify

First Use W to view the current logged-in user, run the W command is the current user, need to keep, other all kicked off. Method One, the traditional way to find the names of other terminals, and then find the response process to kill Copy

Linux how to count the current directory under the number of files, and how many directories? Write a script with the shell below, put it in the current directory, and execute it. Copy Code code as follows: #!/bin/bash #脚本名称

One line can be done, output 32 or 64.You can use "getconf word_bit" and "getconf long_bit" to get the number of digits for WORD and LONG, and 32 and 64 for 64-bit systems respectively.The reference code is as follows: Copy Code code as