BEAUTY AND PLAY
A UNIX Command $chrt -m SCHED_OTHER min/max priority : 0/0 SCHED_FIFO min/max priority : 1/99 SCHED_RR min/max priority : 1/99 SCHED_BATCH min/max priority : 0/0 SCHED_IDLE min/max priority : 0/0 $chrt -b -p 0 4555 $chrt -p 4555 pid 4555’s current scheduling policy: SCHED_BATCH pid 4555’s current scheduling priority: 0 $chrt -o -p 0 4555 …
Continue reading “chrt – manipulate real-time attributes of a process”
A UNIX Command $vdir symmel/ total 20 drwxr-xr-x 2 jeffrin jeffrin 4096 Jul 27 01:11 Docs -rw-r–r– 1 jeffrin jeffrin 88 Jul 25 00:57 kernel_start.asm -rw-r–r– 1 jeffrin jeffrin 78 Jul 25 00:57 kernel_start.s drwxr-xr-x 10 jeffrin jeffrin 4096 Jul 25 00:57 linux drwxr-xr-x 2 jeffrin jeffrin 4096 Jul 26 23:55 loader -rw-r–r– 1 jeffrin …
A UNIX Command $bsd-write jeffrin 8 bsd-write: jeffrin is not logged in on 8 $bsd-write jeffrin tty8 bsd-write: jeffrin has messages disabled on tty8 $mesg y $bsd-write jeffrin tty8 bsd-write: jeffrin has messages disabled on tty8 $w 20:08:58 up 23 min, 3 users, load average: 0.02, 0.15, 0.16 USER TTY FROM LOGIN@ IDLE JCPU PCPU …
A UNIX Command $skill Usage: skill [signal to send] [options] process selection criteria Example: skill -KILL -v pts/* The default signal is TERM. Use -l or -L to list available signals. Particularly useful signals include HUP, INT, KILL, STOP, CONT, and 0. Alternate signals may be specified in three ways: -SIGKILL -KILL -9 General options: …
Continue reading “skill, snice – send a signal or report process status”
A UNIX Parameter $cat /proc/sys/net/ipv4/tcp_retries1 3 $echo 4 > /proc/sys/net/ipv4/tcp_r Parameter Definition This value influences the time, after which TCP decides, that something is wrong due to unacknowledged RTO retransmissions, and reports this suspicion to the network layer. RFC 1122 recommends at least 3 retransmissions, which is the default. Parameter Code Internals snippet 1 { …
A UNIX Command $hcitool hcitool – HCI Tool ver 4.89 Usage: hcitool [options] [command parameters] Options: –help Display help -i dev HCI device Commands: dev Display local devices inq Inquire remote devices scan Scan for remote devices name Get name from remote device info Get information from remote device spinq Start periodic inquiry epinq Exit …
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A UNIX Command $basename basename: missing operand Try `basename –help’ for more information. $basename /usr/bin/ bin $basename /usr/ usr $ $basename /usr/bin/less less $basename /usr/include/ma malloc.h math.h $basename /usr/include/math.h math.h $basename /usr/include/math.h . math.h $basename /usr/include/math.h .h math $basename /usr/lib/libgccpp.so.1 libgccpp.so.1 $basename /usr/lib/libgccpp.so.1 .1 libgccpp.so $ UNIX Explanation `basename’ removes any leading directory components from …
Continue reading “basename – strip directory and suffix from filenames”
A UNIX Command $groff /usr/share/man/man7/pipe.7 | more %!PS-Adobe-3.0 %%Creator: groff version 1.21 %%CreationDate: Fri Jul 15 18:18:46 2011 %%DocumentNeededResources: font Times-Roman %%+ font Times-Bold %%+ font Times-Italic %%DocumentSuppliedResources: procset grops 1.21 0 %%Pages: 1 %%PageOrder: Ascend %%DocumentMedia: Default 595 842 0 () () %%Orientation: Portrait %%EndComments %%BeginDefaults %%PageMedia: Default %%EndDefaults %%BeginProlog %%BeginResource: procset grops 1.21 …
In software engineering, gold is a linker for ELF files. It became an official GNU package and was added to binutils in March 2008[1] [2] and first released in binutils version 2.19. gold was developed by Ian Lance Taylor and a small team at Google.[3] The motivation for writing gold was to make a linker …
FIXME .