Category: Linux Administrator

1. Generate the Key ======================================================Windows:1. Start PuTTYgen on Windows Press Generate and Move over the Randomizer Field======================================================Linux:1. Open the OpenSSH key with the command:> ssh-keygen -b 4096======================================================2. Save public and private key to the disk 3. open authorized_keys on the remote machine> sudo nano ~/.ssh/authorized_keys past the public key:=====================================================ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAQEAg3jaKHicRktxHfik/9HQGgTOVk6ZfqnfizeP0n7Qyd3w//dxjEbS3vdby04FOCSyMnjcvcDd3Y/kC5ioGOuljbYzzl9kypYdvX1MGLk/k3n7PVORhatFr1T02SzcXSXBl6CFAk0KqlaC0BLLBRSLNhTU/Q01uuvDtm14fkHwQn+MZ+vTV+AeTv7daBRi6loHge0BemggwWV9BGcJihz6Fm55mEAWiGXGi4JpRlhFkZIaqwmUx5TyMLft5D0xp04K5aDHN2tkhcfNffV9bWs31yYV4L2sdb2lHTtHU5tomcfdN3PGEANzQDEiTjGSCgz/OQ11EW6eHlDUwdoZQsNpKQ== rsa-key-20190609======================================================WindowsIn putty you have to Weiterlesen…

Clientside Install Xming as Display Server on a Windows Machine whitelist your serverip (security) C:\Program Files (x86)\Xming\X0.hosts (Re)start Xming   Linux SSH (ssh root@remotehost -x)   Windows Putty Connection > SSH > X11 Enabeling X11 Forwarding X display location localhost:0:0   Without SSH if Server is Outside your Network open Port 6000 in your Firewall fritz.box user can click Weiterlesen…

echo dir %1 > %systemroot%\system32\ls.bat One command give you the posibility to use ls in the future instead of dir inside windows useful for linux admins runas /user:administrator cmd > %systemroot%\system32\sudo.bat give you the possibility to start the admin shell with the sudo command

unpack (x = extract, f = file, v = verbose) tar xf archive.tar tar xf archive.tar.xz tar xfvz archive.tar.gz tar xfvj archiv.tar.bz2 unzip archiv.zip bunzip2 file.bz2 tar Dateien/Ordner in ein Archiv packen: tar cfv archiv.tar inhalt1 inhalt2 inhalt3 (c = create) Komprimierte Archive erstellen: tar cfzv archiv.tar inhalt1 inhalt2 inhalt3 (z = komprimieren) Inhalt eines Weiterlesen…

MySQL Installation sudo apt-get -y install mysql-server mysql-client be sure to be root install mysql server + client Secure the mysql Installation sudo mysql_secure_installation Enter password for user root: <– Enter the MySQL root password Press y|Y for Yes, any other key for No: <– Press y if you want this function or press Enter otherwise. Using existing password Weiterlesen…

There are bugs with MySQL after Ubuntu Upgrade.  (4 new server installations) Bring it to work in just one line of code: sudo mv /etc/mysql/my.cnf /etc/mysql/my.cnf.bak && sudo rm -r /etc/mysql/mysql.conf.d/ && sudo mv /etc/mysql/debian.cnf /etc/mysql/debian.cnf.bak && sudo apt purge mysql-server mysql-server-5.7 mysql-server-core-5.7 && sudo apt install mysql-server sudo ln -s /etc/mysql/mysql.conf.d /etc/mysql/conf.d && sudo service mysql Weiterlesen…

less diskinodes? clean up your server by removing old kernels check the ammound of old kernel versions # rpm -q kernel (example output) kernel-2.3.32-642.12.1.el6.x86_64 kernel-2.4.32-643.35.9.el6.x86_64 kernel-2.5.32-644.28.3.el6.x86_64 kernel-2.6.32-647.81.5.el6.x86_64 yum install yum-utils package-cleanup –oldkernels –count=2