Create TAR and pipe through gzip
Submitted by Igor on November 19, 2005 – 10:36 pm2 Comments
Home » Backups, Commands & Shells
2 Comments »
Leave a comment!
The following example shows how to reduce the size of a filesystem mounted on an LVM logical volume. The instructions below are only for non-root filesystems. No reboot is required, but the filesystem will need to be unmounted. So, if there are any user applications using this filesystem, they will need to be stopped and the users will need to log out.
Read the full story »Unix and Linux network configuration. Multiple network interfaces. Bridged NICs. High-availability network configurations.
Reviews of latest Unix and Linux software. Helpful tips for application support admins. Automating application support.
Disk partitioning, filesystems, directories, and files. Volume management, logical volumes, HA filesystems. Backups and disaster recovery.
Distributed server monitoring. Server performance and capacity planning. Monitoring applications, network status and user activity.
Cool Unix shell commands and options. Command-line tools and application. Things every Unix sysadmin needs to know.
After enjoying taking apart Microsoft’s “cloud” Office 365 for the numerous shortcomings of its installation process, having to do the same for my favorite Linux distro – openSUSE – is rather upsetting. OpenSUSE installation routine went from nearly-flawless in 11.1 to mildly annoying in 11.3, arriving to moderately obnoxious in 11.4. What happened? Same as with Microsoft, poor installation workflow is to blame. One can always feel when desktop support people take over workflow tasks from server admins.
Here is a simple script to help you configure Linux postfix to use your Gmail account for sending emails. The script has been tested on OpenSuse 11.4 and 12.1, but should work find on any recent Linux disro. The only requirement is that you have postfix insalled.
On servers with many filesystems calculating filesystem space utilization summary can get very tedious. Below is a simple script that will summarize all filesystems and provide you will the totals for allocated and used space in GB.
Some of the technical issues with Boxee Box could have been fixed if the dev team was paying more attention to addressing the bugs rather than adding “features” of dubious value. In the final analysis, for the price and ease of use, Boxee Box is the best in its class and price range. You just need to be mindful of its limitations and buy it in hope of future improvements to its usability.
Sometimes you just need something very simple to monitor a server or an application on a temporary basis. A basic ping monitor is fine, but it will only tell you if a server is responding on the network. It will not tell you if there is some other problem on the system. The script below relies on passwordless SSH setup to periodically log into the monitored nodes and check on their health by executing a local or remote script.
Changing hostname and IP is frequently required when a server is being moved from testing or development to production. The process is a fairly simple one, but steps must be performed in a certain order to avoid complications.
I try my best to stay away from Windows. I wish my clients did the same. The usual difficulty of troubleshooting elusive network performance problems is amplified many-fold when there is a Windows computer at the end of the line. With Unix it’s relatively simple: run tests “a”, “b”, “c”, etc and follow the familiar process of elimination. With Windows in the picture the number of steps uses up all of the English alphabet and spills over well into the Russian one. And when you finally reach step “я”, you have to pull out your Chinese dictionary.
Here is a quick example showing how to count users logged in on a particular date using the “last” command on Linux.
By default, WordPress will not allow you to upload a file larger than 2Mb. This limit is not set by WordPress itself, but by detaul PHP configuration. This configuration file is usually /etc/php.ini, but normally …
Slashdot
follow: RSS
To uncompress and tar use:
gunzip < target.tar.gz | tar xvf -
[Reply]
Hi,
Do you have an example of using gzip with a pipe?
From Googling, only one I found is from the one below:
http://ididntknowthisyesterday.blogspot.co.nz/2008/09/pipe-into-gzip.html
using
cat myfile.txt | gzip -f > myfile.txt.gz
Will this work for binary files as well?
FYI, reason am wanting to use a pipe is due to lack of disk space, I have 500MB left and am trying to gzip a 400M file. Am assuming by using a pipe, it will use the memory instead of the available disk space while the gzip is in progress, is this correct?
[Reply]