Monthly Archives: March 2012

maps Memory maps to executables and library files

UNIX Parameter $sudo cat /proc/1/maps [sudo] password for jeffrin: 00400000-00409000 r-xp 00000000 08:01 6070276 /sbin/init 00608000-00609000 r–p 00008000 08:01 6070276 /sbin/init 00609000-0060a000 rw-p 00009000 08:01 6070276 /sbin/init 01c21000-01c42000 rw-p 00000000 00:00 0 [heap] 7f641ff63000-7f641ff100000 r-xp 00000000 08:01 14532647 /lib/x86_64-linux-gnu/libdl-2.13.so 7f641ff100000-7f64201100000 —p 00002000 08:01 14532647 /lib/x86_64-linux-gnu/libdl-2.13.so 7f64201100000-7f6420166000 r–p 00002000 08:01 14532647 /lib/x86_64-linux-gnu/libdl-2.13.so 7f6420166000-7f6420167000 rw-p 00003000 08:01 …

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ls ( –sort option)

UNIX Command $pwd /home/jeffrin/shelter/symmel $ls beautifulwork bugs-general debian-howtos firewall language ovlfose books config-files Docs https: linux README $ls –sort=none Docs https: language ovlfose firewall README books debian-howtos linux bugs-general config-files beautifulwork $ls –sort=time firewall Docs config-files beautifulwork bugs-general ovlfose language https: debian-howtos books linux README $ls –sort=size beautifulwork bugs-general debian-howtos firewall language ovlfose books config-files …

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Learning Models

Learning Model I 1. A UNIX Command 2. UNIX explanation 3. Related Source Code Exposition 4. Source Code Highlight 5. Featured Image. 6. Related Knowledge. Learning Model II 1. A UNIX Command 2. UNIX Explanation 3. Theory Drop 4. Connection Learning Model III 1. A UNIX Command 2. Explanation from Multiple Unices. Learning Model IV …

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Theory Building

Theory Building I 1. Look for Command ,API or Parameter. 2. Do theory categorization. Theory Building II 1. Look for Command ,API or Parameter. 2. Do Theory Categorization 3. Abstract Creation. Theory Building III 1. Look for Command ,API or Parameter. 2. Theory Categorization 3. Abstract Creation 4. Theory Explanation . Theory Building IV 1. …

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A look into ls ( –block-size option ) in GNU

ABOUT ls –block-size with -l, scale sizes by SIZE when printing them; e.g., ‘–block-size=M’ [bash light=”true”] $ls info man $ls -l total 8 drwxr-xr-x 2 jeffrin jeffrin 4096 Nov 22 20:39 info drwxr-xr-x 3 jeffrin jeffrin 4096 Nov 22 18:51 man $ls -l –block-size=B ls: invalid –block-size argument `B’ $ls -l –block-size=KB total 9kB drwxr-xr-x …

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tcp_sack – BOOLEAN

A UNIX Parameter $cat tcp_sack 1 $ Parameter Definition tcp_sack – BOOLEAN Enable select acknowledgments (SACKS). SACK is defined by RFCs 2018, 2883, and 3517 (see Resources for links to these RFCs). Plain TCP (in other words, non-SACK) acknowledgments are strictly cumulative-an acknowledgment of N means that byte N and all previous bytes have been …

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