crontab實現每秒執行

crontab：

#!/bin/bash

step=$1   #每多少秒執行一次
 
for (( i = 0; i < 60000000000; i=(i+step) )); do
    date +%Y%m%d' '%H:%M:%S >>/home/xiluhua/procNum.txt    
    ps -ef|grep memcached | grep 11211 >> /home/xiluhua/procNum.txt
    printf "\n" >> /home/xiluhua/procNum.txt
    sleep $step
done

 log backup：

#!/bin/bash
#author:xiluhua
#since:20160619
 
#####################################################################
# $1:the frequency to do log backup
# $2:only if the number of log files reach v_count,log files will be backuped
# $3:target directory that needs to do log backup
# $4:the directory to put bakuped logs
#####################################################################
 
v_step=$1
v_count=$2
v_targDir=$3
v_histDir=$4
 
if [ -z $v_targDir ]
then
    echo "exception: argu 'v_targDir' is empty!"  
    exit
fi
 
if [ -d $v_targDir ]
then
    # do nothing
    echo > /dev/null
else
    echo "exception: argu 'v_targDir' is not exist!"      
    exit
fi
 
if [ -z $v_histDir ]
then
    echo "exception: argu 'v_histDir' is empty!"  
    exit
fi
 
if [ -d $v_histDir ]
then
    # this is the key step to make the .gz file without directory
    cd $v_histDir
else
    echo "exception: argu 'v_histDir' is not exist!"      
    exit
fi
 
if [ -z $v_step ]
then
    echo "v_step is empty!"
    exit
fi
 
if [ -z $v_count ] 
then
    echo "exception: argu 'v_count' is empty!"
    exit
fi
 
let isProcExist=0
# recycle endlessly
while [ "1" = "1" ]
do
    # if same job process already exists,sleep sometime
    while [ "1" = "1" ]
    do
        if [ $isProcExist -gt 0 ]
        then
            sleep $v_step
        else
            break
        fi
    done

    let isProcExist=1

    files=$(find $v_targDir -name "*.log")
    count=$(ls $files | wc -l)

    #echo "count:"$count
    #echo "v_count:"$v_count

    if [ $count -ge $v_count ] 
    then
        dir=$(date +%Y%m%d'_'%H%M%S)
        # give the value to bakDir
        bakDir=$dir

        mkdir $bakDir
        mv $files $bakDir
        #echo $bakDir'.tar.gz'
        tar -Pczf $bakDir'.tar.gz' $bakDir

        if [ $bakDir = "/" ] 
        then
            clear
        else
            rm -r $bakDir
        fi
    fi
    sleep $v_step

    let isProcExist=0
done

 

 autoCreateFile：

 

#!/bin/bash
#author:xiluhua
#since:20160619
 
v_step=$1
if [ -z $v_step ]
then
    echo "exception: argu 'v_step' is empty!"
    exit
fi
 
cd ~/auto
 
for (( i = 0; i < 60000000000; i=(i+step) )); do
    file1=$(date +%Y%m%d'_'%H%M%S)'_1.log'
    file2=$(date +%Y%m%d'_'%H%M%S)'_2.log'
    file3=$(date +%Y%m%d'_'%H%M%S)'_3.log'

    touch $file1 $file2 $file3    
    sleep $v_step
done

 

 

 

 

batchRename：

#!/bin/bash
#author:xiluhua
#since:20160619
#####################################################################
# $1:the dir to do batch file rename
# $2:name before rename
# $3:name after rename
#####################################################################
 
dir=$1
targ=$2
repl=$3

#check arguments is not empty and valid
if [ -z $dir ]
then
    echo "exception: argu 'dir' is empty!"  
    exit
fi

if [ $dir = "/" ]
then
    echo "exception: argu 'dir' is invalid!"  
    exit
fi

if [ -d $dir ]
then
    cd $dir
else
    echo "exception: argu 'dir' is not exist!"
    exit
fi
 
if [ -z $targ ]
then
    echo "exception: argu 'targ' is empty!"
    exit
fi
 
if [ -z $repl ]
then
    echo "exception: argu repl is empty!"
    exit
fi
 
# begin the main business
for i in $(ls *."$targ");do 
#   echo $i
    tmp=${i/"$targ"/"$repl"}
#   echo $tmp
    mv -f $i $tmp
done