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🔒 Karlo Luiten

Linux, SIEM, Security, NextGen Firewalls and more

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Posts

  • Bash add UTF8 (UTF-8) BOM to file
  • Certbot centos 7
  • Get x11 forwarding working on Centos 7 & Putty & Xming
  • Reset ILO via SSH
  • Auto root login Centos 7 / EL 7
  • Set up TOTP/Google authenticator on Centos 7
  • LVM show pvmove status
  • Ovirt POSIX storage failing – Error while executing action Add Storage Connection: Problem while trying to mount target
  • Found ArcSight parser functions
  • Linux screencasting with overlays and all: OBS
  • Tail: prepend file name to tailing output (bash)
  • Node Rocketchat npm fibers not running ( versionGLIBCXX_3.4.20 not found ) on centos/rhel
  • Personal (manual) template for internal hosts
  • ArcSight upgrade/install “Unable to carry out the checkLocalHost check.”
  • Bash suppress all output of script (echo off – style)
  • Certmonger defunct RHEL7
  • Install Domoticz on Centos 7
  • Dell get serial / service tag on windows / linux
  • Fix DRAC too many sessions (invalid credentials)
  • Yum Error: database disk image is malformed fix
  • Nagios check_http HTTP WARNING: HTTP/1.1 400 Bad Request – 1307 bytes in 0.084 second response time
  • MS outlook quoting inline
  • SHA3 of most popular passwords part 5
  • SHA3 of most popular passwords part 4
  • SHA3 of most popular passwords part 3
  • SHA3 of most popular passwords part 2
  • SHA3 of most popular passwords part 1
  • sha3 of 1000 most common English words
  • SVN diff ignore white space
  • Vim reselect previous visual block
  • 6479e00fe1e437780cc1d60217ee374cabfd12eb494e6398dc95484c
  • Shodan IP list
  • RHEL CD repo
  • IPTables firewalld replace
  • FIX Invalidating snapshot: Unable to allocate exception
  • Logical volume vg0/lv contains a filesystem in use.
  • Grep / sed ignore matching and next line
  • Apache/httpd on rentos/rhel pam radius auth fail (Password Mismatch with GOOD password)
  • sssd pam System error 4 at login (FIX)
  • HP storage raid controller status disks
  • GDM Fedora autologin change session
  • Bind mounts
  • Changing nsslapd-cachememsize
  • [FIX] Puppet Failed to load feature test for posix: can’t find user for 0
  • Fedora Nemo disable background/desktop rendering (on awesomewm)
  • Failed to initialize credentials using keytab
  • Tmux session renaming
  • Connect to Slack using a znc bouncer
  • Let’s Encrypt AttributeError: ‘X509’ object has no attribute ‘_x509’
  • Howto: let’s encrypt for znc irc certs
  • Howto: stand alone let’s encrypt on centos7 (certs only)
  • Could not complete SSL handshake. – BUT YOU TRIED EVERYTHING!
  • Linux df says disk is full, du does not add up
  • LVM lv logical volumes not in mapper (or in /dev)
  • Reboot failing in RHEL/centos: Failed to talk to init daemon.
  • Bash compound commands (()){{}}{}[[]]
  • Bash inline number increase (( ++i ))
  • lvm VGrename and lvrename in linux
  • RHEL crash after flush journal to persistent
  • Check SSL ciphers remotely using nmap
  • Offending DSA key /var/lib/sss/pubconf/known_hosts
  • RHEL/Fedora auto apply updates (dnf/yum)
  • RHEL7 systemctl systemd list shutdown jobs (pending)
  • Restart UDEV (/sbin/udevd-d) on RHEL7
  • Get ip info on command line
  • Run programs without execute rights on file
  • java.net.MalformedURLException: unknown protocol: socket
  • Fix broken yum database (DB_RUNRECOVERY)
  • Tmux arrow key navigation
  • Bash keyboard shortcuts
  • Simple sudo
  • Vim clear whole file (clear/delete all lines in vim/vi)
  • Delete old files (with find)
  • SELinux openvpn on Fedora (Network Manager) not working
  • HP iLO 4 on Linux (Opera & Firefox) no Java console
  • tcpdump all but own (connected) ip
  • List all arcsight connector memory usages
  • Fix (13)Permission denied access to * denied * because search permissions are missing on a component of the path
  • Reset HP/HPE iLO 4 password with CLI on Linux
  • Simulate cron environment
  • Sum list of numbers
  • Self extracting zipped encrypted linux package
  • Better top?
  • Get linux process start time and date
  • New server
  • Vim lazy/non greedy search
  • Automate key and mouse events in Linux (xev/xdotool)
  • Better less
  • *nix shorter/better commands (grep/wc/cat) from Useless Use of Cat Award
  • Regenerate grub2
  • No memory reserved for crash kernel
  • FIX error: ‘unixd_config’ undeclared when building apache module
  • Fix “verification of user id ” not configured” with mod_auth_xradius
  • Fix “missing AddRadiusAuth in this context?”
  • FIX misc.py:732:_decompress_chunked:MiscError: xz compression not available
  • Fix rpm/yum database (BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery)
  • RHEL not respecting oddjob mkhomedir umask from login defs
  • Make FreeRADIUS talk to FreeIPA / RHEL IDM
  • NTPq -p output signs before hosts
  • Fix RedHat IDM server problems

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Auto root login Centos 7 / EL 7

sed -i '/ExecStart/ s/agetty/agetty --autologin root/' /etc/systemd/system/getty.target.wants/getty@tty1.service
Posted on November 22, 2018February 12, 2019Author karloCategories Uncategorized

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