Versie van 13 jul 2010 om 13:56

Rolandow's wiki

Vergaarbak van allerlei informatie die ik in de loop der tijd heb verzameld, en niet mag vergeten.

Linux

Passive FTP

Als passive FTP niet werkt, dan moeten er modules geactiveerd worden. In /etc/modules toevoegen ip_conntrack_ftp en ip_nat_ftp.

Linux trics

Create snoop file of a port:

tcpdump -nvv -s 0 -w snoopport10295.snoop port 10295

Check the number of hits per IP, in the Apache access logs:

cat logs/access_log|grep 05/Feb/2007:14|awk '{print $1}'|sort|uniq -c

See what a process is doing:

lsof -p #PID

Last file in a directory:

ls -ltr|tail -n1

Partially extract a tarbal:

tar xvfz backup.tar.gz home/www/login.mobilebridges.com --exclude=*.log --exclude=*.xml

Use the t parameter instead of x to test tar.

tar tvfz backup.tar.gz home/www/login.mobilebridges.com --exclude=*.log --exclude=*.xml

Format your server:

dd if=/dev/zero of=/dev/hda bs=1M

This writes zero's to /dev/hda, so it will erase all data.

Format disk, using fat32:

1. Use fdisk to create the filesystem: fdisk /dev/hda - follow the prompts
2. Format it using mkfs.vfat -F 32 /dev/hda6
3. Add it to fstab

Add user:

adduser --gid 1010 --shell /usr/bin/false --home /home/www/peru charly

The GID should be the same for dutch and peru users. The home directory is different though.

Delete files older than 5 days:

find /home/www/login.mobilebridges.com/htdocs/Delivery/Error/ -mtime +5 -exec rm {} \;

Rename *.11.csv to *.csv:

rename 's/\.11\.csv$/\.csv/' *.csv

The ereg takes care of the rename action... the *.csv after that just selects the files that need to be renamed with this ereg.

Check projectsize Peru on developement:

/home/www/peru# du --max-depth=1 -h

Check if PING's are reaching the server:

tcpdump host 85.146.37.248 and icmp

85.146.37.248 is the source address.

See the number of connections to port 80 by ip:

netstat -pan|grep :80|sed 's/:/ /g'|awk '{print $6}'|sort|uniq -c

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