In today’s world the smartphone has become the mobile communication center in our pocket. All the wireless technologies around us communicate with our smartphones. Wireless technologies drain the battery, but there is a way to extend the battery life. When using … Continue reading
Managing shell commands and processes
Not every command you might execute only runs for a couple of seconds. When you have a long running command a couple of problems can come with it. When the ssh connection is not stable, the command might be interrupted, … Continue reading
Posted in Linux Administration
Tagged bash, screen, SSH
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Setup gitolite to manage git repositories
Git provides all the required tools to create remote repositories. As explained in Setup gitosis to manage git repositories, a bare repository can be generated and managed manually or with gitosis, but this is not the only git repository management … Continue reading
Posted in Linux Administration, Version control system
Tagged git, gitolite
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Utility df shows inconsistent calculation for ext filesystems
The output of “df” might sometimes seem inconsistent or wrong and especially in some situations the presented information seems to obviously not match up. The fact is, the information is not wrong but the calculation behind it considers facts that … Continue reading
Posted in Linux Administration
Tagged df, ext, tune2fs
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Replace section in file with content from another file
While automating things, you might come across the need to replace a block of lines within a file – like replacing a section with IP addresses you want to block in an .htaccess file. Automating this task means replacing this bunch of … Continue reading
Posted in Linux Administration
Tagged sed
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Gitosis Arguments to command look dangerous
Dealing with non-English languages, you might come across a couple of issues caused by special characters. Even gitosis has its limitations in this area. One of the error messages caused by special characters is: “Arguments to command look dangerous”. When a … Continue reading
Posted in Linux Administration, Version control system
Tagged git, gitosis, SSH
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Resize Proxmox VM disc via command line without LiveCD
To increase the disc size from the command line, login to the Proxmox host. In the command line you can list the VMs configured by this command to find the VMID needed. For this example the VM with the VMID … Continue reading
Posted in Linux Administration, Virtualisation
Tagged Debian, LVM, Proxmox, qemu
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Monit restart not working on CentOS – no pid-file after restart
Monit is a monitoring tool that can monitor processes, files and more. In the event of a failed monitor, monit is able to alert or trigger an action. Often the action triggered is to restart the monitored daemon. With the … Continue reading
Posted in Linux Administration, Monitoring
Tagged CentOS, monit
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Gitosis Unsafe SSH username in keyfile
While configuring and using Gitosis you will probably see the following error sooner or later. This error will appear immediately when changed configuration is pushed to the gitosis-admin repository. With this error, the reported user keys are not provisioned properly … Continue reading
Posted in Linux Administration, Version control system
Tagged git, gitosis, SSH
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Restart hanging gpg-agent automatically using swatch on MacOSX
With a smart card reader, you can store your gpg keys on a card to sign, encrypt and even authenticate. What if you try to sign an email but your email client is not responding while signing the email? Or … Continue reading
