One Liner Command Centos

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;
  • 0 Utenti hanno trovato utile questa risposta
Hai trovato utile questa risposta?

Articoli Correlati

Apa Saja System Operasi/Os yang Tersedia?

Kami memiliki berbagai sistem operasi linux yang tersedia untuk menginstal, jika Anda ingin...

Block Bot Dari User Agent String

Tahukah Anda bahwa Anda dapat memblokir bad bot dari file .htaccess Anda? Mari blok bot yang...

Block Bittorrent Traffic Dengan IPtables

IPTABLES adalah program aplikasi user-space yang memungkinkan administrator sistem untuk...

Cara Extrak File tar.gz

Katakanlah Anda ingin mengekstrak tar lastest.tar.gz dari wordpress.org. tar -zxvf latest.tar.gz...

Install Remi Dan EPEL yum repository Centos 7

Menambahkan repo pada Centos 6/7 x86_64 dan i386 Installing optional EPEL yum repo Untuk type...