Author:
erics, February 3rd, 2016
There are times when the hackers slam my servers and the load gets too high. I use a very simple bash script as a cron job to monitor the load and take action when it gets too high. The script will stop httpd, sleep for a configurable period of time (currently 3 minutes), then start […]
Categories: How-To's, Technology Tags: apache, apachectl, bash, Cron, howto, httpd, Restart, tips
| 
No comments
Author:
erics, December 8th, 2015
As always, YMMV… 1 2 3 4 5 6 7 8 9 #!/bin/bash # Usage: eject [fullpath to mount point] DISK="${1:-/Volumes/YourUSBFlashDriveName/}" df -h "$DISK" > /dev/null 2>&1 if [ $? -eq 0 ]; then diskutil unmountDIsk `diskutil list "$DISK" | grep ^/dev/` else echo Volume $DISK is not mounted…skipping. fi #!/bin/bash # Usage: […]
Categories: How-To's, Technology Tags: apple, bash, cli, Command, Command line, Disk, diskutil, Drive, eject, Flash, howto, List, Mac, macosx, mount, Terminal, tips, umount, unmount, unmountDisk, USB, volume
| No comments
Author:
erics, September 15th, 2015
The script to check and restart apache…works on CentOS – YMMV! 1 2 3 4 5 6 7 8 9 10 11 #!/bin/bash MAXLOAD=6 check=$(uptime | awk -F’average: ‘ ‘{print $2}’ | awk ‘{print $1}’ | tr -d ‘,’) if [[ $check > $MAXLOAD ]]; then /sbin/service httpd stop HOST=`hostname` […]
Categories: How-To's, Technology Tags: apache, AWK, bash, CentOS, howto, httpd, Load, load average, Restart, Stop, tips, Uptime
| No comments
Author:
erics, July 7th, 2015
The Readline library has a bell-style variable that controls what happens when Readline wants to ring the terminal bell. If set to ‘none’, Readline never rings the bell. If set to ‘visible’, Readline uses a visible bell if one is available. If set to ‘audible’ (the default), Readline attempts to ring the terminal’s bell. Edit […]
Categories: How-To's, Technology Tags: apple, bash, Bell, howto, inputrc, macosx, readline, Ring, Terminal Bell, tips
| No comments
Author:
erics, February 27th, 2015
1 2 3 4 #!/bin/bash for line in `cat file.txt`; do echo line: $line done #!/bin/bash for line in `cat file.txt`; do echo line: $line done 1 2 3 4 #!/bin/bash for file in $( ls ); do echo filename: $file done #!/bin/bash for file in $( ls ); do echo filename: $file […]
Categories: How-To's, Technology Tags: bash, howto, Loop, tips
| No comments
Author:
erics, January 1st, 2015
awk ‘{sum+=$1}END{print sum}’ inputFile
Categories: How-To's, Technology Tags: Add, AWK, bash, Command line, howto, Math, Shell, Sum, tips
| No comments
Author:
erics, October 1st, 2014
This is the standard upgrade method for AWS Linux AMI’s: 1 2 yum clean all yum update bash yum clean all yum update bash Or use this for the version 2012.09, 2012.03, or 2011.09 repositories: 1 2 yum clean all yum –releasever=2013.03 update bash yum clean all yum –releasever=2013.03 update bash For older AWS Linux […]
Categories: How-To's, Technology Tags: AMI, AWS, AWS Linux, bash, Beta, bug, Linux, patch, ShellShock
| 1 comment
