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Commands by rockon

Terminal - Commands by rockon - 18 results

ps -eo size,pid,user,command --sort -size |awk '{hr[1024**2]="GB";hr[1024]="MB";for (x=1024**3; x>=1024; x/=1024){if ($1>=x){printf ("%-6.2f %s ", $1/x, hr[x]);break}}}{printf ("%-6s %-10s ", $2, $3)}{for (x=4;x<=NF;x++){printf ("%s ",$x)} print ("\n")}'

2012-11-27 04:29:08

User: rockon

Functions: awk ps

Tags: memory usage ps processes, high memory usage

Up
Down

Find processes utilizing high memory in human readable format

Finding high memory usage report in human readable format.

watch -n1 "uptime && ps auxw|grep http|grep -v grep | grep -v watch|wc -l && netstat -ntup|grep :80 |grep ESTABLISHED|wc -l && netstat -ntup|grep :80|grep WAIT|wc -l && free -mo && ps -ylC httpd --sort:rss|tail -3|awk '{print \$8}'"

2012-06-06 12:12:10

User: rockon

Functions: watch

Tags: process monitors

Up
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Server load and process monitoring

In certain cases you mighy need to monitor the server load caused by certain process. For example HTTP, while stress testing apache using ab (apache benchmark) you may want to monitor the server status,load, # of spawned HTTP processes, # of established connections, # of connections in close wait state, apache memory footprint etc.

php -m

2012-05-27 12:08:52

User: rockon

Tags: PHP modules

Up
Down

Check which modules your PHP is using

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

httpd -M

2012-05-27 12:04:17

User: rockon

Tags: http apache httpd modules

Up
Down

See loaded modules in apache

Easiest way to check which modules are loaded in apache.

sestatus -v

2012-05-27 11:48:25

User: rockon

Tags: selinux

Up
Down

Know SELinux status

Usefule to check whether SELinux is in force or disabled.

Though you need to be superuser while execute this command.

mysqladmin -u root -p extended-status

2012-05-27 11:38:11

User: rockon

Up
Down

Mysql extended status

Useful when checking MySQL status.

openssl s_client -connect www.example.com:443 > /tmp/example.com.cert

2012-05-04 06:15:27

User: rockon

Up
Down

Download SSL server certificate with opsnessl

Useful when we need to create new certificate for site when current one is near expiry.

This downloaded cert can be used to provide organisational data directly to new cert. using below command.

e.g. openssl x509 -x509toreq -in /tmp/example.com.cert -out example.com.csr -signkey example.com-key.pem

sar -u 2 5

2009-03-02 04:54:37

User: rockon

Up
Down

Generate the CPU utilization report

Generated the CPU utilization stats with 5 lines /every 2 seconds.

Needs sysstat package to be installed prior to use sar.

lsof +p xxxx

2009-03-02 04:49:23

User: rockon

Up
Down

List the files any process is using

List the files a process is using.

Comments (0) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate

cp /some/path/to/myfile{,.back}

2009-03-02 04:41:18

User: rockon

Functions: cp

Up
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cp the file

Copy the file with the given .extension at the source file's location. Eliminates the typing of long paths again and again.

ethtool -S eth0

2009-03-01 10:25:46

User: rockon

-1

Up
Down

Traffic stat on ethernet interface

Traffic details on the Ethernet interface.

bzgrep -i "pattern" pattern.bz2

2009-03-01 10:21:26

User: rockon

Functions: bzgrep

Up
Down

search the pattern from bzip2'ed file

Search the pattern in bzip2 compressed file with out having to unzip.

pinky -l <username>

2009-03-01 10:17:08

User: rockon

Functions: pinky

Up
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pinky - user info

Gives information about user's home directory and real name and shell user is having.

hdparm -i[I] /dev/sda

2009-03-01 10:00:28

User: rockon

Functions: hdparm

Up
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hard disk information - Model/serial no.

Get the hard disk information with out shutting down and opening the system.

It gives information on model no., serial no., cylinders/heads/sectors, and the supported features of the hard disk.

lsb-release -a

2009-03-01 09:42:52

User: rockon

Up
Down

Know your distro

To know the OS distro and version, release.

Is same like /etc/redhat-release

dmidecode | grep -i prod

2009-02-25 23:05:17

User: rockon

Functions: grep

Up
Down

Getting information about model no. of computer

This command gives a model information of a computer. Also useful in determining the host is a VM machine or actual physical machine.

IPADDR=`ifconfig eth0 | grep -i inet | awk -F: '{print $2}'| awk '{print $1}'`

2009-02-25 22:58:19

User: rockon

Functions: awk grep

-1

Up
Down

Filtering IP address from ifconfig usefule in scripts

Useful in scripts while you just need an IP address in a variable.

rm -rf `ls | head -5000`

2009-02-25 22:52:23

User: rockon

Functions: head rm

-3

Up
Down

Delete tens of thousans of files at one go

Deletes thousands of files at one go, I'm not able to recall the exact # of files that rm can delete at one go(apprx. around 7000.)

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate