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Tugriceri Web Notes

Operational telemetry, Linux internals, forensic carving, and infrastructure automation war stories. by Emre Tugriceri.

88 Field Runbooks 30 System Taxonomies Archive: 2013 – 2026 SYS_HEALTH: OPTIMAL
GLOBAL SYSTEM TAXONOMY [30 MODULES] SELECT TO PIN QUERY
antivirus 2 backup 2 cisco 10 drbd 2 dvb 10 firewalls 6 forensic 2 hardware 2 http 6 linux 57 lvm 4 mail 6 mysql 6 network 6 networking 1 php 2 programming 4 recovery 2 samba 2 security 38 selinux 4 shell 16 spam 4 squid 2 ssh 4 strongswan 2 uncategorized 28 windows 2 yum 2 zfs 2
Emre Tugriceri • • 1 min read
Linux Yum

Yum Proxy settings

[root@localhost ~]# vi /etc/yum.conf

  • proxy=http://10.129.0.23:8080
  • http_proxy=http://10.129.0.23:8080

[root@localhost ~]# declare -x ftp_proxy="http://10.129.0.23:8080"
[root@localhost ~]# declare -x http_proxy="10.129.0.23:8080"


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Emre Tugriceri • • 1 min read
Security

SSL Weak Cipher and SSLv2 tests

echo 'GET HTTP/1.0' | openssl s_client -ssl3 -cipher LOW -connect www.tugriceri.com:443
echo 'GET HTTP/1.0' | openssl s_client -ssl2 -cipher LOW -connect www.tugriceri.com:443
echo 'GET HTTP/1.0' | openssl s_client -ssl2 -connect www.tugriceri.com:443


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Emre Tugriceri • • 1 min read
Linux LVM

LVM Create

1031 dmsetup ls --tree
1040 dmsetup remove /dev/dm-11 (silinen partition ın dmden kalkmaması sebebi ile)
1041 fdisk -l
1044 pvcreate /dev/mapper/mpath11
1045 pvdisplay
1046 vgcreate VolGroupBackup /dev/mapper/mpath11
1047 pvdisplay
1048 vgdisplay
1049 lvcreate -L 699.99G VolGroupBackup lvBackup
1050 lvcreate -L 699.99G VolGroupBackup -n lvBackup
1051 lvdisplay
1052 ls /dev/VolGroupBackup/lvBackup
1053 ls /dev/mapper/
1054 mkfs.ext3 /dev/mapper/VolGroupBackup-lvBackup
1058 mount
1059 mount /dev/mapper/VolGroupBackup-lvBackup /mnt/backup/

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