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after changing security settings, creating or modifying authentication alias you can reload security settings without restarting websphere processes. reload security settings on specific websphere process set agm [ $AdminControl queryNames type=AuthorizationGroupManager,process=,* ] reload security settings on all processes set agm [ $AdminControl queryNames type=AuthorizationGroupManager,* ] Case 1: check depth of 1 particular queue set qpoint “WebSphere:*,type=SIBQueuePoint,name=MyQueuePointName” Case 2: check all the queue points set qpoint “WebSphere:*,type=SIBQueuePoint” Create queue manager crtmqm -c “QMANAGER DESCRIPTION” -q QMANAGER_NAME.QUEUE.MANAGER Create queue manager and default queue crtmqm -q -d DEFAULT.QUEUE -u SYSTEM.DEAD.LETTER.QUEUE -c “QMANAGER DESCRIPTION” QMANAGER_NAME.QUEUE.MANAGER launch display queue manager(s) display queue(s) display channel(s) display listener(s) check queue status clear queue display connections dspmq Start Q Manager Stop Q Manager endmqm -w OFB.OCC.QMGR Display queue names and number of messages in the queue Display the queue Depth dis ql(*) CURDEPTH WHERE(CURDEPTH GT 0 ) Display where channel is RETRYING dis chs (*) where (status EQ retrying) Display Current Sequence Number dis chl(*) -> display all channels echo “dis q(*)” | runmqsc endmqm qmanager Command to start the queue manger Start the Quemanager strmqm QMGR2 Stop the Queue Manager endmqm qmanager endmqm TPCAS.AUD.QMGR2 Check the queue manager is working $ dspmq -x Connect to queue manager runmqsc QMGR1 dis channel (*) Logs /var/mqm/errors runmqsc ROLBRKPRDV.QM DISPLAY CHSTATUS (VROLBRK.VIPC.*) DISPLAY CHSTATUS (CDISI.CORE.AUDIT) runmqsc ROLBRKPRDS.QM Start MQSC MQSC:show queue information MQSC:remove all messages from queue MQSC:enable trigger on queue MQSC:disable trigger on queue MQSC:show process information Using runmqsc in a script This vill display all queues (‘dis q(*)’) on the qmanager Using the q (ma01) program to distribute messages from one queue to two queues endmqm qmanager runmqsc ROLBRKPRDV.QM DISPLAY CHSTATUS (VROLBRK.VIPC.*) runmqsc ROLBRKPRDS.QM Useful Commands for MQ administration dspmqver :- to display MQ series version Useful syntax of RUNMQSC utility for hadling QueueManager DEFINE :- To define/create MQ manager objects like queue, Channels, process, and listener. IBM MQ Commands Some simple and useful IBM MQ Commands I found useful for debugging or testing the channels and queues. Some MQ Commands Use ‘mqm’ user At : /usr/mqm/bin Connect to Queue Manager Display Channel info Display Channel full info Check channel is alive start channel( Display Queue Alias Info dis qa( Display Remote Queue Info Display Local Queue Info Display Channel messages info including last message date and time Zerolize Counter (curdepth) in queue stop CHANNEL( start CHANNEL( It should then show zero messages : Perform a test put message Test message Backup the message 1. Logon to “sl73cdisapp001” using “mqm” Backup messages from a Queue to a file: import messages from a file to the queue: Copying messages from a queue to another queue: ====================================== MQ WORKS ON point to point Assure delivery Persittance Fast connection is also open always A —> B MQM username mqm mqm AIX – ROOT U+G created .bff sol – root u+g before install manually .pkg Lin – root u+g befor installl .rpm win – !!! .exe /opt/mqm = is binary placed /var/mqm = we have logs LIN SOL AIX WIN BINARY /opt/mqm /opt/mqm /usr/mqm D/ E:/Program files runtime /var/mqm /var/mqm /var/mqm (Qmgr) dspmqmver check the arch crtmqm crtmqm TESTQM1 to display dspmqm strmqm TESTQMQ1 endmqm -i TESTQMQ1 dspmqm cd /var/mqm qm.ini ps -ef | grep mqlsr runmqsc TESTQMQ1 display QMGR dis channel dis chl (*) dis chl(*) where (TYPE EQ SDR) dis q(*) DEFINE LISTENER(TESTQM1.LS1) TRPTYPE (TCP) PORT (21414) crtmqm TESTQMQ1 DEFINE QLOCAL (TESTQM1.LOCAL) Alter QLOCAL (TESTQM1.LOCAL) MAXDEPTH(1000) dis q (TESTQM1.LOCAL) MAXDEPTH A —> B Sender channel (testqm1.to.testqm2) Reciever channel (testqm1.to.testqm2) CREATE QM crtmqm TESTC define qlocal(TESTCQM2.TQ1) USAGE(XMITQ) CREATE LISTENER DEFINE LISTENER(TESTC.LS1) TRPTYPE(TCP) PORT(21418) control (qmgr) LQ define qlocal(TESTC.LQ1) delete qlocal(TESTCQM1.LQ1) delete the queue manager TQ DEFINE qlocal(TESTC.TQ1) USAGE(XMITQ) SENDER CHANNEL DEFINE channel(TESTC.TO.TESTD) CHLTYPE(SDR) CONNAME(‘10.211.48.247(21419)’) XMITQ(‘TESTC.TQ1’) RECEVER CHANNEL DEFINE channel(TESTD.TO.TESTD) CHLTYPE(RCVR) DEFINE channel(TESTD.TO.TESTC) CHLTYPE(RCVR) RQ define QREMOTE(TESTC.RQ1) RNAME(‘TESTD.LQ1’) RQMNAME(‘TESTD’) XMITQ(‘TESTC.TQ1’) Test Functinality dis listener(TESTC.LS1) crtmqm TESTB Delte QUEUE MANAGER dltmqm TESTC IN CLUSTER ALLWAYS CREATE RECIEVER MQ CLUSETERING software clustering (Active – Active) Active – Passive clussdr clusrcvr we dont have TQ,RQ,SDR CHL RCR CHL Full repository and partially Repository crtmqm clusqm1 strmqm clusqm1 define listener(CLUSQM1.LS1) TRPTYPE(TCP) PORT(21414) Start listener(CLUSQM1.LS1) How to clear the messages clear command amqsget dis q(qm4.lq1) curdepth /opt/mqm/samp/bin/amqsget /opt/mqm/samp/bin/amqsgbr /opt/mqm/samp/bin/amqsgbrc [root@oracledb ~]# hostname [root@oracledb ~]# vi /etc/hosts lo Link encap:Local Loopback [root@oracledb ~]# vi /etc/hosts [root@oracledb ~]# sysctl -p [root@oracledb ~]# vi /etc/pam.d/login if [ $USER =”oracle” ]; then working one ORACLE_BASE=/opt/oracle/app/oracle; [oracle@oracledb ~]$ source .bash_profile Oracle #! /bin/bash case “$1” in 2?dbstartup dbshutdown $ vi $ORACLE_HOME/bin/dbstartup #dbstartup #dbshutdown 3? # cd /etc/rc.d/init.d 4?oracle # chmod 750 /etc/rc.d/init.d/oracle [root@oracledb~]# xhost +
[root@oracledb CVU_11.2.0.1.0_oracle]# sh runfixup.sh download the url from http://mirror.centos.org/centos/6.5/os/i386/Packages/ wget http://mirror.centos.org/centos/6.5/os/i386/Packages/libaio-0.3.107-10.el6.i686.rpm yum install libaio* rpm -ivh compat-libstdc++-33-3.2.3-69.el6.i686.rpm Oracle common commands SQL> select banner from v$version; BANNER [root @ oracledb ~] # lsnrctl start # turn on the remote listening port oracle user POODLE = Padding Oracle On Downgraded Legacy Encryption B.E.A.S.T (Browser Exploit Against SSL TLS) SSL3.0 is obsolete and no security protocol, has been TLS 1.0, TLS 1.1, TLS 1.2 substitution, for compatibility reasons, most of the TLS implementation is still compatible SSL3.0. Order generic considerations, the current versions of most browsers support SSL3.0, handshake phase contains a version of the TLS protocol negotiation procedure, in general, the client and the latest version of the protocol server will be used. When the handshake phase of its server version of consultations carried out, first offer its latest version of the support agreement, if the handshake fails, then try to negotiate an older version of the protocol. An attacker able to implement the-middle attack by the affected versions of the browser and the server side using the newer protocol negotiated connection fails, you can successfully downgrade attack, allowing the client and server communicate using insecure SSL3.0, At this time, due to the use of SSL 3.0 CBC block encryption implementations exist vulnerability, an attacker can successfully break the encryption SSL connection information, such as access to the user cookie data. This attack is called POODL attack (Padding Oracle On downgraded Legacy Encryption). This vulnerability affects the majority of SSL server and client, extensive sphere of influence. If you want to use, but the attacker is successful, need to be able to control data (Executive middle attack) between the client and the server. Although SSLv3 is an older version of the protocol which is mainly obsolete, many pieces of software still fall back on SSLv3 if better encryption options are not available. More importantly, it is possible for an attacker to force SSLv3 connections if it is an available alternative for both participants attempting a connection. The POODLE vulnerability affects any services or clients that make it possible to communicate using SSLv3. Because this is a flaw with the protocol design, and not an implementation issue, every piece of software that uses SSLv3 is vulnerable. To find out more information about the vulnerability, consult the CVE information found at CVE-2014-3566. What is the POODLE Vulnerability? Who is Affected by this Vulnerability? Some common pieces of software that may be affected are web browsers, web servers, VPN servers, mail servers, etc. How Does It Work? Since these cannot be verified by the receiving party, an attacker can replace these and pass them on to the intended destination. When done in a specific way, the modified payload will potentially be accepted by the recipient without complaint. An average of once out of every 256 requests will accepted at the destination, allowing the attacker to decrypt a single byte. This can be repeated easily in order to progressively decrypt additional bytes. Any attacker able to repeatedly force a participant to resend data using this protocol can break the encryption in a very short amount of time. How Can I Protect Myself? Servers and clients should should take steps to disable SSLv3 support completely. Many applications use better encryption by default, but implement SSLv3 support as a fallback option. This should be disabled, as a malicious user can force SSLv3 communication if both participants allow it as an acceptable method. How To Protect Common Applications Because the POODLE vulnerability does not represent an implementation problem and is an inherent issue with the entire protocol, there is no workaround and the only reliable solution is to not use it. Apache IBM IHS How to test the sslv3 enabled openssls_client -connect <webserver>:443 -ssl3
Nginx ssl_protocols TLSv1 TLSv1.1 TLSv1.2; IIS: Browser Prohibited Method: IE: Chrome: Copy a shortcut usually open Chrome browser on the new shortcut, right-click, enter the property, FireFox: In the address bar, enter “about: config”, then security.tls.version.min adjusted to 1. MySQL openssl ciphers -v ‘DEFAULT’ | awk ‘/SSLv3 Kx=(RSA|DH|DH(512))/ { print $1 }’ mysql -se “SHOW STATUS LIKE ‘Ssl_cipher_list’” | sed ‘s/:/n/g’ | sed ‘s/Ssl_cipher_listss//g’ | To disable SSLv3 in an HAProxy load balancer, you will need to open the haproxy.cfg file. This is located at /etc/haproxy/haproxy.cfg: nano /etc/haproxy/haproxy.cfg frontend name You will need to restart the service to implement the changes: service haproxy restart See this post on the OpenVPN forums for more information. Postfix SMTP Server You can find this in the main Postfix configuration file: nano /etc/postfix/main.cf smtpd_tls_mandatory_protocols=!SSLv2, !SSLv3 service postfix restart For most distros, you can adjust this directive by opening this file: nano /etc/dovecot/conf.d/10-ssl.conf ssl_protocols = !SSLv3 !SSLv2 ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL:!SSLv3 Restart the service in order to implement your changes: service dovecot restart Server: Centos Logical Volume Disk to use:
fdisk -cu /dev/sdb Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) Command (m for help): n Command (m for help): t Command (m for help): w Calling ioctl() to re-read partition table. fdisk -cu /dev/sdc fdisk -cu /dev/sdd Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) Command (m for help): n Command (m for help): t Command (m for help): w Calling ioctl() to re-read partition table. [root@diskserver ~]# pvcreate /dev/sdb1 [root@diskserver ~]# vgcreate vg01 /dev/sdb1 /dev/sdc1 [root@diskserver ~]# mkfs.ext4 /dev/mapper/vg01-lv_test Writing inode tables: done This filesystem will be automatically checked every 32 mounts or [root@diskserver ~]# mkdir /media/my_disk [root@diskserver ~]# dd if=/dev/zero of=/media/my_disk/noodles.log bs=1572864000 count=1 [root@diskserver ~]# pvcreate /dev/sdd1 [root@diskserver ~]# vgdisplay -v vg01 — Logical volume — — Physical volumes — PV Name /dev/sdc1 PV Name /dev/sdd1 [root@diskserver ~]# vgextend vg01 /dev/sdd1 [root@diskserver ~]# vgdisplay -v vg01 — Logical volume — — Physical volumes — PV Name /dev/sdc1 PV Name /dev/sdd1 [root@diskserver ~]# pvs -o+pv_used — Logical volume — — Physical volumes — PV Name /dev/sdd1 Unlocking /var/lock/lvm/V_vg01 [root@diskserver ~]# pvs [root@diskserver ~]# lvdisplay — Logical volume — — Logical volume — — Logical volume — [root@diskserver ~]#lvdisplay root@diskserver ~]# lvreduce -L -50G /dev/vg01/lv_test [root@diskserver ~]# resize2fs /dev/mapper/vg01-lv_test [root@diskserver my_disk]# df -TH [root@diskserver ~]# lvextend -l +4607 /dev/mapper/vg01-lv_test [root@diskserver ~]# e2fsck -f /dev/vg01/lv_test 1. Remove all logs of manager& admin
#!/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 [ $siz_catalina -ge “3600000” ];then echo “catalina.out greater that 35MB, tarring the catalina.out file as catalina.out.`date +%F-%I-%M-%p` and nullifieng the file” >> diskutil.log tar -cvzf /cda1-logs-backups/catalina.out.`date +%F-%I-%M-%p`.tar.gz catalina.out if [ -s /cda1-logs-backups/catalina.out.`date +%F-%I-%M-%p`.tar.gz ]; then `:>catalina.out` fi else echo “Catalina Log file less than 35 MB at `date +%F-%I-%M-%p`” >> diskutil.log fi
if [ -s catalina.`date +%F -d “-1 day”`*.log ] then tar -zcvf /cda1-logs-backups/catalina.`date +%F -d “-1 day”`*.log.tar.gz catalina.`date +%F -d “-1 day”`*.log rm -f catalina.`date +%F -d “-1 day”`.log echo ” Backup of catalina.`date +%F -d “-1 day”`*.log taken and removed ” >> logrotate else echo “catalina.`date +%F -d “-1 day”`*.log doesnt exist ” >> logrotate fi ———————————————————————————————————— #– Removing blank localhost_access files 30 1 * * * find /usr/local/apache-tomcat-6.0.18/logs -name “localhost_access*” -type f -size 0c | xargs rm 30 1 * * * find /usr/local/apache-tomcat-6.0.18/logs -name “manager*” -type f -size 0c | xargs rm
#– Removing blank localhost_access files 30 1 * * * find /usr/local/apache-tomcat-6.0.18/logs -name “localhost_access*” -type f -size 0c | xargs rm 30 1 * * * find /usr/local/apache-tomcat-6.0.18/logs -name “manager*” -type f -size 0c | xargs rm ———————————————————————————————————— Count Apache & tomcat connections # crontab -e */1 * * * * /home/rack/countdbconnections.sh >> /home/rack/countdbconnection # vi countdbconnections.sh #!/bin/bash apache_con=`ps -ef | grep apache | wc -l` tomcat_total_con=`netstat -an | grep :7001 | wc -l` tomcat_est=`netstat -an | grep :7001 | grep ESTABLISHED | wc -l` tomcat_wait=`netstat -an | grep :7001 | grep TIME_WAIT | wc -l` echo “$(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.
# cat file |awk NR==2′{print $0}’
# cat file |awk ‘/Iowa/,/Montana/’ # case sensitive
# cat file |awk NR==8,NR==12′{print $0}’
# cat file |awk ‘a !~ $0; {a=$0}’
# awk ‘length < 64’
# cat file |awk /^$/{++x}END'{print x}’
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 }
# awk -F “:” ‘{ print $1 | “sort” }’ /etc/passwd
# 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}’
awk ‘{for (i=1; i<=NF; i++) s=s+$i}; END{print s}’
# awk ‘{for (i=1; i<=NF; i++) if ($i < 0) $i = -$i; print }’ # awk ‘{for (i=1; i<=NF; i++) $i = ($i < 0) ? -$i : $i; print }’
# 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}’
# awk ‘{ print NF “:” $0 } ‘
# awk ‘{ print $NF }’
# awk ‘{ field = $NF }; END{ print field }’
# awk ‘NF > 4’
awk -F ‘:’ ‘{ total += NF }; END { print total }’ /etc/passwd
awk -F ‘:’ ‘$NF ~ /\/bin\/sh/ { n++ }; END { print n }’ /etc/passwd
awk -F ‘:’ ‘$3 > maxuid { maxuid=$3; maxline=$0 }; END { print maxuid, maxline }’ /etc/passwd
awk ‘NR % 2 == 0’ /etc/passwd
awk -F ‘:’ ‘$3==$4’ passwd.txt
awk -F ‘:’ ‘$3>=100 && $NF ~ /\/bin\/sh/’ passwd.txt
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
It is possible to rotate the catalina.out log, by using a log rotation program like rotatelogs or cronolog. It is possible to rotate the catalina.out log, but it is not controlled by the standard logging.properties or log4j.properties files. The catalina.out log is stderr and stdout piped to a file. If you want to rotate this log file you will need to use a log rotation program like rotatelogs or cronolog. Then just pipe to the log rotation program rather than the file. Here is an example of how to do this with cronolog. Using another program would be very similar, the command in step #3 would just be slightly different. 1.) Edit the bin/catalina.sh file. 2.) Find the following line and comment it out. touch "$CATALINA_BASE"/logs/catalina.out Note that in later versions of Tomcat this may look like: touch "$CATALINA_OUT" 3.) Find the following line (there should be two instances of this line, replace both) >> "$CATALINA_BASE"/logs/catalina.out 2>&1 & and replace it with this line 2>&1 |/usr/bin/cronolog "$CATALINA_BASE/logs/catalina-%Y-%m-%d.out" & Note that in later versions of Tomcat the line that needs to be replaced may look like: >> "$CATALINA_OUT" 2>&1 & 4.) Save bin/catalina.sh 5.) Restart Tomcat. You should now have a “catalina-2010-03-30.out” file in your logs directory. When the date changes a new log file will be created. The following day you should see “catalina-[following date].out”. Please note that the log file may not be rotated exactly at midnight. It will rotate the first time something is written to the log after the date has changed. This generally isn’t a problem for busy log files. I am interested in catalina.out log file rotation, I have an application where logging to catalina.out is very huge, say 0.5 MB / sec. So I have written one script to handle this which is shown below.
# crontab -l | grep catalina 0,30 * * * * bash /catalina_log_handler.sh >/dev/null 2>&1
# more /catalina_log_handler.sh #!/bin/sh CATLOC=/bin/cat SEDLOC=/usr/bin/sed $CATLOC /catalina.out >> /catalina_backup.out à take a backup and then handle this file rotation using logadm $SEDLOC ” catalina.out > catalina.out à Empty this file
There are two cases here
1.) The below is normal behavior where not much logging # ls -ltrh catalina* -rw-r—– 1 ems ems 15K Jan 31 12:07 catalina.2012-01-31.log -rw-r—– 1 ems ems 3.9K Feb 1 06:26 catalina.2012-02-01.log -rw-r—– 1 ems ems 345K Feb 1 06:45 catalina.out -rw-r–r– 1 root root 14M Feb 1 07:00 catalina_backup.out
2.) The below is heavy logging behavior # ls -ltrh catalina* -rw-r—– 1 ems ems 4.2K Jan 28 22:14 catalina.2012-01-28.log à why I am seeing catalina file with date, have the same content as catalina.out -rw-r—– 1 ems ems 362 Jan 30 06:30 catalina.2012-01-30.log -rw-r—– 1 ems ems 10M Jan 30 14:43 catalina.out.2 -rw-r–r– 1 root root 1.7M Jan 30 17:00 catalina_backup.out.9.gz -rw-r–r– 1 root root 1.6M Jan 30 20:00 catalina_backup.out.8.gz -rw-r–r– 1 root root 1.6M Jan 30 23:00 catalina_backup.out.7.gz -rw-r–r– 1 root root 1.6M Jan 31 02:00 catalina_backup.out.6.gz -rw-r—– 1 ems ems 113M Jan 31 03:30 catalina.out.3 -rw-r–r– 1 root root 1.8M Jan 31 06:00 catalina_backup.out.5.gz -rw-r—– 1 ems ems 6.2M Jan 31 10:04 catalina.out -rw-r—– 1 ems ems 4.5K Jan 31 10:04 catalina.2012-01-31.log -rw-r–r– 1 root root 1.8M Jan 31 10:30 catalina_backup.out.4.gz -rw-r–r– 1 root root 1.8M Jan 31 15:00 catalina_backup.out.3.gz -rw-r–r– 1 root root 1.8M Jan 31 19:30 catalina_backup.out.2.gz -rw-r–r– 1 root root 1.8M Feb 1 00:00 catalina_backup.out.1.gz -rw-r–r– 1 root root 12M Feb 1 01:00 catalina_backup.out -rw-r—– 1 ems ems 12M Feb 1 01:12 catalina.out.1 à why this is latest file ? Is this because of huge logging, Can I disable default catalina.out rotation so that my script will take care of moving the content from catalina.out to catalina_backup.out… |
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