1. Remove all logs of manager& admin

  1. Remove 90 days old logs 
  2. Backup logs greater that 35MB

#!/bin/bash

rm -rf /app/tomcat-6.0.18/logs/*manager* /app/tomcat-6.0.18/logs/*admin*

find /cda1-logs-backups -name ‘*.gz’ -mtime +90 -exec rm {} \;

echo “Initiating logrotate `date +%F-%A`” >> /app/tomcat-6.0.18/logs/diskutil.log

cd /app/tomcat-6.0.18/logs/

siz_catalina=`/bin/ls -l catalina.out | /bin/awk ‘{ print $5 }’`

if [ $siz_catalina -ge “3600000” ];then

echo “catalina.out greater that 35MB, tarring the catalina.out file as catalina.out.`date +%F-%I-%M-%p` and nullifieng the file” >> diskutil.log

tar -cvzf /cda1-logs-backups/catalina.out.`date +%F-%I-%M-%p`.tar.gz catalina.out

if [ -s  /cda1-logs-backups/catalina.out.`date +%F-%I-%M-%p`.tar.gz ]; then

`:>catalina.out`

fi

else

echo “Catalina Log file less than 35 MB at `date +%F-%I-%M-%p`” >> diskutil.log

fi

  1. Backup one day old logs

if [ -s catalina.`date +%F -d “-1 day”`*.log ]

then

tar -zcvf /cda1-logs-backups/catalina.`date +%F -d “-1 day”`*.log.tar.gz catalina.`date +%F -d “-1 day”`*.log

rm -f catalina.`date +%F -d “-1 day”`.log

echo ” Backup of catalina.`date +%F -d “-1 day”`*.log taken and removed ” >> logrotate

else

echo “catalina.`date +%F -d “-1 day”`*.log doesnt exist ” >> logrotate

fi

————————————————————————————————————

#– Removing blank localhost_access files

30 1 * * * find /usr/local/apache-tomcat-6.0.18/logs -name “localhost_access*” -type f -size 0c | xargs rm

30 1 * * * find /usr/local/apache-tomcat-6.0.18/logs -name “manager*”  -type f -size 0c | xargs rm

 

 

 

#– Removing blank localhost_access files

30 1 * * * find /usr/local/apache-tomcat-6.0.18/logs -name “localhost_access*” -type f -size 0c | xargs rm

30 1 * * * find /usr/local/apache-tomcat-6.0.18/logs -name “manager*”  -type f -size 0c | xargs rm

————————————————————————————————————

Count Apache & tomcat connections

# crontab  -e

*/1 * * * *     /home/rack/countdbconnections.sh >> /home/rack/countdbconnection

# vi countdbconnections.sh

#!/bin/bash

apache_con=`ps -ef | grep apache | wc -l`

tomcat_total_con=`netstat -an | grep :7001 | wc -l`

tomcat_est=`netstat -an | grep :7001 | grep ESTABLISHED | wc -l`

tomcat_wait=`netstat -an | grep :7001 | grep TIME_WAIT | wc -l`

echo “$(date): apache_conn = $apache_con, tomcat_established_conn = $tomcat_est, tomcat_time_wait = $tomcat_wait”

# less countdbconnection

Wed Jul 18 12:18:01 BST 2012: apache_conn = 33, tomcat_established_conn = 11, tomcat_time_wait = 809

Wed Jul 18 12:19:02 BST 2012: apache_conn = 38, tomcat_established_conn = 22, tomcat_time_wait = 690

————————————————————————————————————

Monitor Java CPU and System load avg

# crontab -e

*/2 * * * *     /root/scripts/monitor_pcpu_cda_per.sh >> /root/scripts/monitor_pcpu_cda_per.out

# vi monitor_pcpu_cda_per.sh

java_cpu=”$(date): Java CPU: $(top -b -n1  | grep java | head -1 | awk {‘print $9’})”

server_load=”Load: $(w | head -1 | awk {‘print $10’})”

echo $java_cpu $server_load

# less monitor_pcpu_cda_per.out

Fri Jul 20 06:58:02 BST 2012: Java CPU: 5.9 Load: 0.11,

Fri Jul 20 07:00:02 BST 2012: Java CPU: 96.0 Load: 0.17,

Fri Jul 20 07:02:01 BST 2012: Java CPU: 0.0 Load: 0.36,

————————————————————————————————————

Restart tomcat if it is down and count open files

# vi /root/scripts/tomcatrestart.sh

ps -ef | grep “/rss/tomcat-6.0.18/” | grep -v grep

if [ $? -eq 0 ]; then

Openfiles=`/usr/sbin/lsof | wc -l`

echo “checked at time `date` and rss is up, Openfiles=$Openfiles” >> /root/scripts/tomcatcheck.out

else

/bin/sh /rss/tomcat-6.0.18/bin/startup.sh

echo “<<<<<< RSS is down, restarted it at `date` >>>>>>>” >> /root/scripts/tomcatcheck.out

mail -s “Restarted RSS @ web2-prod” harora4@sapient.com,vsrivastav4@sapient.com

fi

if [ $Openfiles -ge 10000]; then

echo “OpenFiles @ `hostname` reached its limit of $Openfiles” | mail -s “`hostname`: OpenFiles=$Openfiles” harora4@sapient.com,vsrivastav4@sapient.com

else

cat /dev/null

fi

# less tomcatcheck.out

checked at time Wed Mar 14 15:44:03 GMT 2012 and rss is up, Openfiles=24779

checked at time Wed Mar 14 15:45:03 GMT 2012 and rss is up, Openfiles=21161

————————————————————————————————————

# Script to be used for Removal of Cached Memory

#!/bin/bash

CACHE_MEM=`free -m |awk ‘NR==2’ |awk ‘{ print$7 }’`

LIMIT=2000

if [ “$CACHE_MEM” -gt “$LIMIT” ]

then

`sync; echo 3 > /proc/sys/vm/drop_caches`

mail -s “CACHE_MEM is now cleared and the value was ##### $CACHE_MEM #####” vsrivastav4@sapient.com

else

echo exiting > /dev/null

fi

————————————————————————————————————

Restart Tomcat if connections goes high

curl -v http://262670-web1-prod.visitbritain.com:7001/cs/Satellite/en_EN/ > /root/scripts/connstatus.out

count=$(cat /root/scripts/connstatus.out | wc -l)

if [ $count -gt 200 ]; then

echo “checked at time `date` and rss is up and responding, Openfiles=`/usr/sbin/lsof | wc -l`” >> /root/scripts/check_8Sep

else

netstat -alpn > /root/scripts/connectionstat_`date +%F-%I-%M-%p`

# taking thread dump two times

pgrep -f /rss/tomcat-6.0.18/temp | xargs kill -3

pgrep -f /rss/tomcat-6.0.18/temp | xargs kill -3

# kill tomcat process

pgrep -f /rss/tomcat-6.0.18/temp | xargs kill -9

/bin/sh /rss/tomcat-6.0.18/bin/startup.sh

fi

rm -f /root/scripts/connstatus.out

————————————————————————————————————

Checking Disk Space and send alert

#!/bin/sh

limit=80

df -H  | grep ” /” | grep -vE ‘^Filesystem|tmpfs|cdrom|boot’ | awk ‘{ print $4 ” ” $5 }’| while read i;

do

perc=$(echo $i | awk ‘{ print $1}’ | cut -d’%’ -f1)

part=$(echo $i | awk ‘{ print $2 }’ )

if [ $perc -ge $limit ]; then

echo “Running out of space \”$part ($perc%)\” on $(hostname) as on $(date)” | mail -s “Alert: Almost out of disk space $usep” vsrivastav4@sapient.com

fi

done

2nd Method

df -h | grep -e [8-9][0-9]%

if [ `echo $?` -ne 0 ]; then

exit

else

df -h | grep -e [8-9][0-9]% -e Use% | mail -s “Disk space more than 80%”  arora4@sapient.com -c vsrivastav4@sapient.com

fi

————————————————————————————————————

Script if 15 minutes load goes >= 6.0.

#!/bin/bash

NOTIFY=”6.0″

FTEXT=’load average:’

# 15 min

F15M=”$(uptime | awk -F “$FTEXT” ‘{ print $2 }’ | cut -d, -f3)”

RESULT=$(echo “$F15M > $NOTIFY” | bc)

# if load >= 6.0 create a file /tmp/file.txt

if [ “$RESULT” == “1” ]; then

echo ‘LOAD ISSUE’>/tmp/file.txt

fi

————————————————————————————————————

Rename files .txt to .new in a directory

#!/bin/bash

echo “Enter Directory”

read dir

for i in `ls $dir/*`

do

mv $i $i.new

done

————————————————————————————————————

Cut the huge log file in half

#!/bin/bash

size=`cat $file|wc -l`

half=$(echo “$size/2″|bc)

tail -$half $file > $loc/file1.txt    // for lower half

tail +$half $file > $loc/file2.txt    // for upper half

If Condition : http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html

AWK

Que:- Why awk?

Ans:-   The Awk text-processing programming language and is a useful tool for manipulating text.

Awk recognizes the concepts of “file”, “record”, and “field”.

A file consists of records, which by default are the lines of the file. One line becomes one record.

Awk operates on one record at a time.

A record consists of fields, which by default are separated by any number of spaces or tabs.

Field number 1 is accessed with $1, field 2 with $2, and so forth. $0 refers to the whole record.

  1. To print 2nd line of a file

# cat file |awk NR==2′{print $0}’

  1. Print section of file between two regular expressions (inclusive)

# cat file |awk ‘/Iowa/,/Montana/’             # case sensitive

  1. Print section of file based on line numbers (lines 8-12, inclusive)

# cat file |awk NR==8,NR==12′{print $0}’

  1. Remove duplicate, consecutive lines (emulates “uniq”)

# cat file |awk ‘a !~ $0; {a=$0}’

  1. Print only lines of less than 65 characters

# awk ‘length < 64’

  1. To print no. of blanks lines in a file

# cat file |awk /^$/{++x}END'{print x}’

  1. Average five grades

john 85 92 78 94 88

andrea 89 90 75 90 86

jasper 84 88 80 92 84

# cat file |awk{total = $2 + $3 + $4 + $5 + $6; avg = total / 5; print $1, avg }

  1. Print and sort the login names of all users

# awk -F “:” ‘{ print $1 | “sort” }’ /etc/passwd

  1. Print the first 2 fields, in opposite order, of every line

# awk ‘{print $2, $1}’ file

10.Switch the first 2 fields of every line

# awk ‘{temp = $1; $1 = $2; $2 = temp}’ file

11.Print every line, deleting the second field of that line

# awk ‘{ $2 = “”; print }’

12.Print in reverse order the fields of every line

# awk ‘{for (i=NF; i>0; i–) printf(“%s “,i);printf (“\n”)}’ file 13.Print the sums of the fields of every line  # awk ‘{s=0; for (i=1; i<=NF; i++) s=s+$i; print s}’

  1. Add all fields in all lines and print the sum

awk ‘{for (i=1; i<=NF; i++) s=s+$i}; END{print s}’

  1. Print every line after replacing each field with its absolute value

# awk ‘{for (i=1; i<=NF; i++) if ($i < 0) $i = -$i; print }’

# awk ‘{for (i=1; i<=NF; i++) $i = ($i < 0) ? -$i : $i; print }’

  1. Print the total number of fields (“words”) in all lines

# awk ‘{ total = total + NF }; END {print total}’ file

 17.Print the total number of lines that contain “Beth”

# awk ‘/Beth/{n++}; END {print n+0}’ file

18.Print the largest first field and the line that contains it

# awk ‘$1 > max {max=$1; maxline=$0}; END{ print max, maxline}’

  1. Print the number of fields in each line, followed by the line

# awk ‘{ print NF “:” $0 } ‘

  1. Print the last field of each line

# awk ‘{ print $NF }’

  1. Print the last field of the last line

# awk ‘{ field = $NF }; END{ print field }’

  1. Print every line with more than 4 fields

# awk ‘NF > 4’

  1. Count the total number of fields in a file.

awk -F ‘:’ ‘{ total += NF }; END { print total }’ /etc/passwd

  1. Count number of users who is using /bin/sh shell

awk -F ‘:’ ‘$NF ~ /\/bin\/sh/ { n++ }; END { print n }’ /etc/passwd

  1. Find the user details who is having the highest USER ID

awk -F ‘:’  ‘$3 > maxuid { maxuid=$3; maxline=$0 }; END { print maxuid, maxline }’ /etc/passwd

  1. Print the even-numbered lines

awk ‘NR % 2 == 0’ /etc/passwd

  1. Print every line which has the same USER ID and GROUP ID

awk -F ‘:’ ‘$3==$4’ passwd.txt

  1. Print user details who has USER ID greater than or equal to 100 and who has to use /bin/sh

awk -F ‘:’ ‘$3>=100 && $NF ~ /\/bin\/sh/’ passwd.txt

  1. Print user details who doesn’t have the comments in /etc/passwd file

awk -F ‘:’ ‘$5 == “” ‘ passwd.txt

How to print line above/below of a string pattern in a file.

# cat Portin.log

<PORTIN_ACK>

< Receiver>220</Receiver>

< TimeStamp>2011-10-19T10:53:07.225+05:30</TimeStamp>

< PortAccepted>N</PortAccepted>

< SubscriberSequence>

< MSISDN>8985001696</MSISDN>

< ResultCode>RC00006</ResultCode>

< /SubscriberSequence>

< /PORTIN_ACK>

# awk ‘{arr[NR]=$0; if($0 ~ /RC00006/)s=NR} END{print arr[s-1]}’ Porting.log

O/P:-< MSISDN>8985001696</MSISDN>

# awk ‘{arr[NR]=$0; if($0 ~ /RC00006/)s=NR} END{print arr[s-2]}’ Porting.log

O/P:- <SubscriberSequence>

GREP:

How to count no of blank lines in a file?

# grep –c “^$” <filename>

How to remove Empty lines form a given file?

# grep –v “^$”  filename > temfilename

What is pattern to search 4 digit word in a file?

# grep “\<[0-9] [0-9] [0-9] [0-9]\>” filename

What is pattern to search the line having only three characters?

# grep “^…$” filename

What is pattern to display lines ending with “$” character in a given file?

# grep “\$$” filename

CUT

Getting a List of User Accounts on the System

# cut -d: -f1 /etc/passwd | sort

How to display 2 and 4 th fileds from a given file if the delimetr is “:”?

# Cut –d”:” –f 2,4 filename

O2Scripts : https://drive.google.com/?tab=wo&authuser=0#folders/0BzYdExDgx78PVHYzSTRBQUpfSGM
IF Conditions

File test operators, Returns true if…-e:  file exists

-a:  file exists

-f:  file is a regular file (not a directory or device file)

-s:  file is not zero size

-d:  file is a directory

-b:  file is a block device

-c:  file is a character device

device0=”/dev/sda2″    # /   (root directory)

if [ -b “$device0” ]

then

echo “$device0 is a block device.”

fi

Output # /dev/sda2 is a block device.

device1=”/dev/ttyS1″   # PCMCIA modem card.

if [ -c “$device1” ]

then

echo “$device1 is a character device.”

fi

-p:  file is a pipe

function show_input_type()

{

[ -p /dev/fd/0 ] && echo PIPE || echo STDIN

}

show_input_type “Input”                           # STDIN

echo “Input” | show_input_type                    # PIPE

-h:  file is a symbolic link

-L:  file is a symbolic link

-S:  file is a socket

-t:  file (descriptor) is associated with a terminal device

This test option used to check whether stdin [ -t 0 ] or stdout [ -t 1 ] in a given terminal.

-r:  file has read permission (for the user running the test)

SLAPD_CONF = ”/usr/local/etc/openldap/slapd.conf”

for i in “$SLAPD_CONF”

do

if [ ! -r $i ]

then

message “alert” “[ALERT] can’t read $i”

exit 1

fi

done

-w: file has write permission (for the user running the test)

-x: file has execute permission (for the user running the test)

SLAPD_BIN=”$SLAPD_PATH/libexec/slapd”

SLAPCAT_BIN=”$SLAPD_PATH/sbin/slapcat”

for i in “$SLAPD_BIN” “$SLAPCAT_BIN” “$SLAPINDEX_BIN” “$SLAPTEST_BIN” “$SLURPD_BIN” “$DB_ARCHIVE_BIN” “$DB_RECOVER_BIN”

do

if [ ! -x $i ]

then

message “alert” “[ALERT] can’t execute $i”

exit 1

fi

done

-g:  set-group-id (sgid) flag set on file or directory

-u:  set-user-id (suid) flag set on file

-k:  sticky bit set

-O:  you are owner of file

-G:  group-id of file same as yours

-N:  file modified since it was last read

f1 -nt f2:  file f1 is newer than f2

f1 -ot f2:  file f1 is older than f2

f1 -ef f2:  files f1 and f2 are hard links to the same file

!:  “not” — reverses the sense of the tests above (returns true if condition absent).

Link: http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html

Are you root (for port < 1024)?

if [ $PORT -lt 1024 -a `id -u` -ne 0 ]

then

message “alert” “[ALERT] only root can launch OpenLDAP on port $PORT”

exit 1

fi

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