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Full Discussion: Substr with % - extract numbers only
Top Forums UNIX for Beginners Questions & Answers Substr with % - extract numbers only Post 303035751 by danielshell on Sunday 2nd of June 2019 05:09:50 AM
Old 06-02-2019
Substr with % - extract numbers only
Code:
 # cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.5 (Maipo)

I have this script that will monitor filesystems and send me e-amil alerts.

Code:
#! /bin/ksh 
DIST_LIST=monitor@...com

WORKDIR=/home/monitor
WARNLEVEL=90

MAIL_SUBJ="filesystems monitor on "$(hostname)

ALERT_ADMIN () { mail -s "${MAIL_SUBJ}"  $DIST_LIST  << EOF
Filesystem $fsname has reached $sz% of its capacity.
EOF
return
}

cd . > $WORKDIR/freespace.lst
exec 8< $WORKDIR/freespace.lst

df -k | grep -v -i Filesystem | grep -v ":" | awk '{print $5}' |  grep -v "%" | grep -v proc > $WORKDIR/freespace.lst

if [ -f $WORKDIR/freespace.lst ]
then
 while read -u8 fsname sz ;
   do
   if [[ $sz -gt $WARNLEVEL ]]
     then  
        ALERT_ADMIN
    fi 
done 
fi

rm $WORKDIR/freespace.lst

However, the ksh gets % as well.

Code:
Filesystem                        Size  Used Avail Use% Mounted on
/dev/mapper/vg00-rootlv            10G  1.9G  8.2G  19% /
devtmpfs                          189G     0  189G   0% /dev
tmpfs                             189G   39M  189G   1% /dev/shm
tmpfs                             189G  380M  188G   1% /run
tmpfs                             189G     0  189G   0% /sys/fs/cgroup
/dev/mapper/vg00-usrlv            5.0G  2.4G  2.7G  47% /usr
/dev/mapper/vg00-tmplv            8.0G   41M  8.0G   1% /tmp
/dev/mapper/vg00-homelv           4.0G   45M  4.0G   2% /home
/dev/mapper/vg00-usrlocallv       2.0G  674M  1.4G  34% /usr/local
/dev/mapper/vg00-optlv            8.0G  563M  7.5G   7% /opt
/dev/mapper/vg00-optstagelv        40G   18G   23G  44% /opt/stage
/dev/emcpowerg2                   976M  262M  648M  29% /boot
/dev/emcpowerg1                   200M  9.8M  191M   5% /boot/efi
/dev/mapper/vg00-varlv            4.0G  1.3G  2.8G  31% /var

Code:
19%
0%
1%
1%
0%
47%
1%
2%
34%
7%
44%
29%
5%
31%
31%
1%
4%
2%
11%

Please let me know how to grep numbers only..
I have tried substr($5,1,2) substr($1,1,2), but I am misssing something here.

Thank you!
 

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LEARN ABOUT CENTOS

vgimportclone

VGIMPORTCLONE(8)					      System Manager's Manual						  VGIMPORTCLONE(8)

NAME

       vgimportclone - import and rename duplicated volume group (e.g. a hardware snapshot)

SYNOPSIS

       vgimportclone [-n|--basevgname VolumeGroupName] [-i|--import] PhysicalVolume [PhysicalVolume...]

DESCRIPTION

       vgimportclone is used to import a duplicated VG (e.g. hardware snapshot).  Duplicate VG(s) and PV(s) are not able to be used until they are
       made to coexist with the origin VG(s) and PV(s).  vgimportclone renames the VG associated with the specified PV(s) and changes the  associ-
       ated VG and PV UUIDs.

OPTIONS

       See lvm(8) for common options.

       -n, --basevgname VolumeGroupName
	      By  default  the	snapshot  VG  will be renamed to the original name plus a numeric suffix to avoid duplicate naming (e.g. 'test_vg'
	      would be renamed to 'test_vg1').	This option will override the base VG name that is used for all  VG  renames.	If  a  VG  already
	      exists with the specified name a numeric suffix will be added (like the previous example) to make it unique.

       -i, --import
	      Import exported Volume Groups.  Otherwise VGs that have been exported will not be changed (nor will their associated PVs).

ENVIRONMENT VARIABLES

       LVM_BINARY
	      The LVM2 binary to use. Defaults to "lvm".

Examples
       The origin VG "vg00" has origin PVs "/dev/sda" and "/dev/sdb" and the respective snapshot PVs are "/dev/sdc" and "/dev/sdd".  To rename the
       VG associated with "/dev/sdc" and "/dev/sdd" from "vg00" to "vg00_snap" (and to change associated VG and PV UUIDs) do:

       vgimportclone --basevgname vg00_snap /dev/sdc /dev/sdd

SEE ALSO

       lvm(8), vgrename(8)

Red Hat, Inc.					     LVM TOOLS 2.02.105(2)-RHEL7 (2014-03-26)					  VGIMPORTCLONE(8)
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