Showing entries with tag "Linux".

Found 7 entries

Linux: Fedora 22 major package versions

Fedora 22 has been released and I gathered the versions of some core packages:

Package Version
Perl 5.20.2
PHP 5.6.9
Vim 7.4.640
Apache 2.4.12
Kernel 4.0.4
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Linux: write a network image to an SD card

If you have a fast network connection you can read an ISO directly from the Internet and write to a flash drive, or SD card. Just pipe curl to dd (requires root) and you're done.

curl ftp://mirror.web-ster.com/centos/7.2.1511/isos/x86_64/CentOS-7-x86_64-NetInstall-1511.iso | sudo dd of=/dev/sde bs=1M
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Linux: Remote desktop client

For a long time I have used rdesktop on Linux to connect to remote Windows boxes. Redhat is deprecating rdesktop because it does not the support modern encryption technologies that Window uses. Instead they are recommending that users switch to xfreerdp. Here is the syntax you'll need to use to connect to a remote Windows server:

xfreerdp /u:Administrator /v:10.1.8.93
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Tar: Auto detecting the compression type

The Linux tar command has a cool feature to auto-detect the file compression based on the archive suffix.

-a, --auto-compress

use archive suffix to determine the compression program

This allows you to change file compressions by just changing the archive suffix:

tar -cvpaf /tmp/backup.tar.gz ~/
tar -cvpaf /tmp/backup.tar.bz2 ~/
tar -cvpaf /tmp/backup.tar.xz ~/

This saves you having to specify -z -j or -J respectively.

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Linux: Fedora 25 major package versions

Fedora 25 has these versions of some core packages:

Package Version
Apache 2.4.23
GCC 6.2.1
Kernel 4.8.6
Perl 5.24.0
PHP 7.0.12
Vim 7.4.1989
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Linux: Debian 9 major package versions

Debian 9 ships with these versions of some core packages:

Package Version
Apache 2.4.25
GCC 6.3.0
Kernel 4.9.0
Perl 5.24.1
PHP 7.0.19
Vim 8.0.550
Git 2.11.0
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Linux: Count CPU instructions

Zend published this infographic and it got me thinking about CPU instructions. According to the graphic, the Wordpress homepage required 9.4 billion machine instructions to render, but they've optimized PHP7 and it's now down to 2.6 billion. To count CPU Instructions on a Linux box you can use the perf command:

perf stat -e instructions <my_command>

In comparison, some very simple Linux commands take a significant amount of instructions:

# Approximately 640,000 instructions
perf stat -e instructions echo '' 

# Approximately 2 million instructions
perf stat -e instructions cd ~

# Approximately 700,000 instructions
perf stat -e instructions clear
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