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LICENSING.txt
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LICENSING.txt
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This is free and unencumbered software released into the public domain.
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Anyone is free to copy, modify, publish, use, compile, sell, or
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distribute this software, either in source code form or as a compiled
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binary, for any purpose, commercial or non-commercial, and by any
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means.
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In jurisdictions that recognize copyright laws, the author or authors
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of this software dedicate any and all copyright interest in the
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software to the public domain. We make this dedication for the benefit
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of the public at large and to the detriment of our heirs and
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successors. We intend this dedication to be an overt act of
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relinquishment in perpetuity of all present and future rights to this
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software under copyright law.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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For more information, please refer to <http://unlicense.org/>
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22
README.md
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README.md
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TC Slowify
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==========
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Shell scripts to help you simulate slow network connections
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-----------------------------------------------------------
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*Requirements (generally included in Ubuntu, Fedora, OpenSuse, Gentoo, Debian, Mandriva, etc)*:
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- tc (a Linux command, part of the iproute2 package)
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- netem (included in the 2.6 Linux kernel)
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*Usage*:
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- ./apply.sh
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- Applies limiting rules; prompts you to select an interface name, rate, and latency
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- ./remove.sh
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- Removes limiter from that interface
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- ./status.sh
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- Shows rules on that interface (sometimes other rules may already exist, that's ok)
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*License*:
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The Unlicense, see LICENSING.txt
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20
apply.sh
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apply.sh
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# TC Slowify
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# Shell scripts to help you simulate slow network connections
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# By Will Bradley
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# Thanks to https://gist.github.com/trongthanh/1196596
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# Released via the Unlicense (see LICENSING.txt)
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echo ""
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read -e -i "lo" -p "Interface name to limit (ex: `ls -C /sys/class/net | sed 's/\s\+/, /g'`): " ifname
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read -e -i "56kbps" -p "Limit amount (including units, ex: 56kbps): " limit
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read -e -i "200ms" -p "Latency amount (including units, ex: 200ms): " latency
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sudo tc qdisc add dev $ifname root handle 1: htb default 12
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sudo tc class add dev $ifname parent 1:1 classid 1:12 htb rate $limit ceil $limit
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sudo tc qdisc add dev $ifname parent 1:12 netem delay $latency
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echo ""
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echo "Set limiter on $ifname to:"
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echo ""
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sudo tc -s qdisc ls dev $ifname
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17
remove.sh
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remove.sh
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# TC Slowify
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# Shell scripts to help you simulate slow network connections
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# By Will Bradley
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# Thanks to https://gist.github.com/trongthanh/1196596
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# Released via the Unlicense (see LICENSING.txt)
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echo ""
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read -e -i "lo" -p "Interface name to un-limit (ex: `ls -C /sys/class/net | sed 's/\s\+/, /g'`): " ifname
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sudo tc qdisc del dev $ifname root
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echo ""
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echo "Removed limiter; $ifname is now:"
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echo ""
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sudo tc -s qdisc ls dev $ifname
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