Category: Technical

Or counting files in any folder(s) for i in `ls -al /var/spool/postfix |grep ‘^d’|awk ‘{print $9}’|grep -v ‘\.$’`; do c=`find $i|wc -l`; echo “$c $i”; done;

Check installed kernels: # rpm -q kernel kernel-2.6.32-279.el6.x86_64 kernel-2.6.32-279.2.1.el6.x86_64 kernel-2.6.32-279.5.2.el6.x86_64 kernel-2.6.32-279.9.1.el6.x86_64 Remove old kernels: # package-cleanup –oldkernels –count=2 Make it permanent: #vi etc/yum.conf installonly_limit=2

First, we attach the vmdk to the vm and then scan the bus to see it in linux: # echo “- – -” > /sys/class/scsi_host/host0/scan In this scenario, /dev/sda2 and /dev/sdb2 have the same volume group name of VolGroup00, let’s rename /dev/sdb2 to VolGroup01: # vgimportclone –basevgname VolGroup01 /dev/sdb2 next let’s find the new VolumeGroup:…

find . -type d -print0 | xargs -0 du -s | sort -n | tail -10 | cut -f2 | xargs -I{} du -sh {}