One Liner Command Centos Cetak

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kill all pts

for x in $(ps aux | grep pts| awk '{print $2}'); do kill $x; done

Strace all php-fpm process by a single user for debugging

echo; read -p "User Name: " _user_ ;strace -ffTttvs20000 -o ~/strace.$_user_.log $(ps aux | grep php-fpm | grep $_user_ | awk '{print $2}'| sed 's/\([0-9]*\)/\-p \1/g')

Strace for apache

strace -ffTttvs20000 -o ~/strace.apache.log $(ps aux | grep apache |grep -v grep | awk '{print $2}'| sed 's/\([0-9]*\)/\-p \1/g')

What process is using up the most memory

ps aux | awk '{if ($5 != 0 ) print $2,$5,$6,$11}' | sort -k2n

Find the top files in MB for the Current GROUP user

find $PWD -type f -group $(stat -c "%G" $PWD) -exec du --block-size=MB {} \;  | sort -rn | uniq | head

Find the larges directories in MB for the current GROUP user

find $PWD -type d -group $(stat -c "%G" $PWD) -exec du --block-size=MB {} \;  | sort -rn | uniq | head

Apache Oneliners

Bandwidth per IP/Bot

grep -i google transfer.log | awk '{ sum+=$10} END {size= sum / 1048576; printf "total size %.2f MB\n", size}'

Max_Clients - Check which account is getting the most traffic

for z in $(find /home/*/var/*/logs/transfer.log); do echo $z; echo '----------'; for x in $(seq -w 0 24); do echo -n "$x  "; grep -c "$(date +%d/%b/%Y:)$x" $z; done;done;

Check the Number of IP's Connecting over Port 80

netstat -tn |grep EST| grep :80 | awk '{print $5}'| cut -d: -f1 | sort | uniq -c | sort -rn | head
netstat -tn |grep EST| grep :80 | awk '{print $5}'| cut -d: -f4 | sort | uniq -c | sort -rn | head

Check what IP's are getting the most traffic

netstat -tn | grep EST | grep :80 | awk '{print $4}' |cut -d: -f1 | sort |uniq -c | sort -rn | head
netstat -tn |grep EST| grep :80 | awk '{print $4}'| cut -d: -f4 | sort | uniq -c | sort -rn | head

size of logs

ls -lahrS /home/*/var/*/logs/*log

what are the php-cgi processes doing? (sleeps for 5 seconds, command takes a while to run, will open up less when it's done)

sleep 5; for i in $(ps aux |grep php-cgi |grep -v defunct |grep -v grep |awk '{print $2}'); do strace -p $i -o $i.trace ; done ; cat *.trace | less &&  rm -rf *.trace

top 20 URLs from the last 5000 hits

tail -5000 ./transfer.log | awk '{freq[$7]++} END {for (x in freq) {print freq[x], x}}' | sort -rn | head -20

top 20 URLS excluding POST data from the last 5000 hits

tail -5000 ./transfer.log | awk -F"[ ?]" '{freq[$7]++} END {for (x in freq) {print freq[x], x}}' | sort -rn | head -20

top 20 IPs from the last 5000 hits

tail -5000 ./transfer.log | awk '{freq[$1]++} END {for (x in freq) {print freq[x], x}}' | sort -rn | head -20

top 20 URLs requested from a certain ip from the last 5000 hits

IP=1.2.3.4; tail -5000 ./transfer.log | awk -v ip=$IP ' $1 ~ ip {freq[$7]++} END {for (x in freq) {print freq[x], x}}' | sort -rn | head -20

top 20 URLS requested from a certain ip excluding, excluding POST data, from the last 5000 hits

IP=1.2.3.4; tail -5000 ./transfer.log | awk -F"[ ?]" -v ip=$IP ' $1 ~ ip {freq[$7]++} END {for (x in freq) {print freq[x], x}}' | sort -rn | head -20

top 20 referrers from the last 5000 hits

tail -5000 ./transfer.log | awk '{freq[$11]++} END {for (x in freq) {print freq[x], x}}' | tr -d '"' | sort -rn | head -20

top 20 user agents from the last 5000 hits

tail -5000 ./transfer.log | cut -d\  -f12- | sort | uniq -c | sort -rn | head -20

sum of data (in MB) transferred in the last 5000 hits

tail -5000 ./transfer.log | awk '{sum+=$10} END {print sum/1048576}'

IPs using the most bandwidth (in MB) from the last 5000 hits

tail -5000 ./transfer.log | awk '{tx[$1]+=$10} END {for (x in tx) {print x, "\t", tx[x]/1048576, "M"}}' | sort -k 2n | tail -n 20 | tac

hits per hour

for x in $(seq -w 0 23); do echo -n "$x  "; grep -c "$(date +%d/%b/%Y:)$x" ./transfer.log; done;

Mysql Oneliners

Show locked tables

show open tables WHERE In_use > 0;

Check what size the Innodb Buffer Pool should be

SELECT CONCAT(ROUND(KBS/POWER(1024,  IF(PowerOf1024<0,0,IF(PowerOf1024>3,0,PowerOf1024)))+0.49999),  
SUBSTR(' KMG',IF(PowerOf1024<0,0,  IF(PowerOf1024>3,0,PowerOf1024))+1,1)) recommended_innodb_buffer_pool_size  FROM (SELECT SUM(data_length+index_length) KBS 
FROM information_schema.tables  WHERE engine='InnoDB') A,  (SELECT 3 PowerOf1024) B;

Show all Definers

show procedure status;

Change Procedure Definer

UPDATE `mysql`.`proc` p SET definer = 'use1r@%' WHERE definer='user2t@%'

Check uptime

mysql> \s;

Adjust innodb_lock_wait_timeout, might need a restart but most systems are not read only

m -e'set global innodb_lock_wait_timeout = 150;' && m -e'set session innodb_lock_wait_timeout = 150;'
  • note I have setup an alias for m to connect to mysql in my bashrc file
alias m='mysql -u <user> -p<longuglypasswod>'

Check database size for all databases

SELECT table_schema "DB Name", Round(Sum(data_length + index_length) / 1024 / 1024, 1) "DB Size in MB" FROM information_schema.tables GROUP  BY table_schema;

Check Free space in the Database - Free space in the tablespace not allocated to any segment

SELECT table_schema "Data Base Name", sum( data_length + index_length ) / 1024 /1024 "Data Base Size in MB",sum( data_free )/ 1024 / 1024 "Free Space in MB"FROM information_schema.TABLES GROUP BY table_schema ;

Check when the databases where last updated

use information_schema; SELECT MAX(UPDATE_TIME), MAX(CREATE_TIME), TABLE_SCHEMA FROM TABLES GROUP BY TABLE_SCHEMA ORDER BY 1, 2;

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