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批量ssh登录机器

#site_search_hosts 10.4.16.205,10.4.20.87,10.4.20.88,10.4.20.89,10.4.20.90,10.4.20.92,10.4.20.93,10.4.21.51,10.4.21.52,10.4.21.53,10.4.21.54,10.4.33.136,10.4.33.137,10.4.33.138,10.4.33.139,10.4.33.140

site_search_hosts='10.4.16.205,10.4.20.87,10.4.20.88,10.4.20.89,10.4.20.90,10.4.20.92,10.4.20.93,10.4.21.51,10.4.21.52,10.4.21.53,10.4.21.54,10.4.33.136,10.4.33.137,10.4.33.138,10.4.33.139,10.4.33.140'

NODE_HOSTS=(${site_search_hosts//,/ })

#NODE_HOSTS=(

# 10.4.33.136

# 10.4.33.137

# 10.4.33.138

# 10.4.33.139

# 10.4.33.140

# )

NODE_HOSTS_CNT=${#NODE_HOSTS[@]}

echo $NODE_HOSTS_CNT

for (( i=0; $i<${NODE_HOSTS_CNT}; i=$i+1 ))

ssh "tiger@${NODE_HOSTS[$i]}" "hostname -i; \

cd .service

done

例行

lastday=''

while [ 1 ]; do

day=`date +%Y%m%d`

hour=`date +%H`

echo $lastday

echo $day

echo $hour

if [ "${day}" != "${lastday}" -a ${hour} -eq 6 ]; then

cur_date=`date -d -1day +%Y%m%d`

echo 'run'

lastday=$day

sleep 600

echo "done"

done

读入文件

n=0

CONF_FILE="action_needed.conf"

cat $CONF_FILE |

while read LINE

echo "$n) $LINE"

n=`expr $n + 1`

done

字符串处理

$ date=`date`

$ echo $date

Mon Nov 30 10:52:09 CST 2015

$ echo ${date#* * * }

10:52:09 CST 2015

$ t1=${date#* * * }

$ echo ${t1%:*:*}

#First, get file name without the path:

filename=$(basename "$fullfile")

extension="${filename##*.}"

filename="${filename%.*}"

#Alternatively, you can focus on the last '/' of the path instead of the '.' which should work even if you have unpredictable file extensions:

filename="${fullfile##*/}"

正则表达式匹配

s="hdfs://hdfs.example.com:8800/app/yaoyao/20141203/part-00042"

if [[ $s =~ [0-9]{8,8} ]]; then

echo ${BASH_REMATCH[0]}

例行拉取日志（backtrack.sh）

#!/bin/bash

# Step 1: Check Parameters

if [ $# -lt 2 ]; then

echo ""

echo "Usage: sh $0 LastDay DaysToDownload"

echo "Example: sh $0 20140831 7, this will download logs for 7 days: 20140825-20140831."

echo ""

exit

# Step 2: Fetch log data

last_day=$1

days_to_download=$2

for((i = 1; i <= ${days_to_download} ; ++i));

(( finished = i - 1))

(( togo = ${days_to_download} - finished ))

echo ""

echo "-------"

if [ ${last_day} = "yesterday" ]; then

day=`date -d -${i}day +%Y%m%d`

else

day=`date -d "${last_day} ${finished} days ago" +%Y%m%d`

echo "[`date`] Downloading log for ${day}, ${finished} finished, ${togo} to go......"

start_date=`date`

for ((j=1; j<=3; j++));

# download logs

# download logs finished

if [ $? -eq 0 ]; then

break

done

end_date=`date`

echo "Finished ${day}. Started at ${start_date}, finished at ${end_date}"

done

echo ""

echo "Finished downloading $2 logs ( ${day} - ${last_day} ) !"

echo ""

例行拉取日志（forwardtrack.sh）

#!/bin/bash

# Step 1: Check Parameters

if [ $# -lt 2 ]; then

echo ""

echo "Usage: sh $0 FirstDay DaysToDownload"

echo "Example: sh $0 20140825 7, this will download logs for 7 days: 20140825-20140831."

echo ""

exit

# Step 2: Fetch log data

first_day=$1

days_to_download=$2

for ((i=1; i<=${days_to_download}; i++));

(( finished = i - 1))

(( togo = ${days_to_download} - finished ))

echo ""

echo "-------"

day=`date -d "${first_day} ${finished} days" +%Y%m%d`

echo "[`date`] Downloading log for ${day}, ${finished} finished, ${togo} to go......"

start_date=`date`

for ((j=1; j<=3; j++));

# download logs

# download logs finished

if [ $? -eq 0 ]; then

break

done

end_date=`date`

echo "Finished ${day}. Started at ${start_date}, finished at ${end_date}"

done

echo ""

echo "Finished downloading $2 logs ( ${first_day} - ${day} ) !"

echo ""

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