Would you like unix time, gregorian date-time, microseconds, delta microseconds? Simplest with min latency:
Commands that read stdin with a buffered FILE* often get the pipe data several K at a time, delayed. I have found that reading one byte at a time, like line does, overcomes this latency. Commands that write() one line at a time may not have this problem. Your UNIX may vary!
Can any body please explain the following df command to me:filesystem kbytes used avail capacity mounted on
/dev/root 6474195 2649052 3825143 41% /
/dev/stand 24097 5757 18340 24% /stand
/proc 0 0 0 ... (7 Replies)
Hello all, I know it can be done but don't know the command.
I would like to run vmstat via cron, I don't know a good interval and don't want huge logs but want stats pretty often.
Please someone who uses vmstat via cron let me know what your script looks like.
Thank you (11 Replies)
Hi
I want to give the user the choice of whether or not they want to include a certain option when they run the script.
This is my getops:
while getopts " s: d: r f: e h " option
do
case $option in
f ) dsxfile="$OPTARG";;
d ) dbname="$OPTARG";;
s ) dsn="$OPTARG";;
r )... (0 Replies)
Dear All,
I want to get the rows from file1.txt whose first column is exactly as the numbers (not subset) from file1.txt. so, i have to read by line from file1.txt and search in file2.txt. So the first column of the output must be the same as the file1.txt.
I used
% egrep -w -f... (5 Replies)
Hi,
Just some questions on the script below...?
Given: bash-2.03$ command -a option1 name1 name2
ParseOptions()
{
local Len=${#@}
local Ctr=2 #always start at 2
local Name=()
local Iter=0
while ; do
if <- Is this correct? so I can get the $2... (2 Replies)
set -A title
set -A author
count=1
index=0
while
do
read -A ${title}?"Booktitle: "
read -A ${author}?"Author(s): "
(( count = count + 1 ))
(( index = index + 1 ))
done
Hi... (1 Reply)
I getting error as test1.sh: syntax error at line 3: `do' unexpected while i was trying to run below code..
What was going wrong here?
find /usr/tmp/SB/reports/ -type f -name *.rdf |read file;do
echo "Copying $file to /usr/tmp/SB1"
done (1 Reply)
The problem I am having now is calling and reading a command and The Main script reads the data file and passes the input to the two calculation scripts, and than output to a file.
1.
The Main Script
-----------------
input=inputfilepj3
output=outfilepj3
echo "*** Converting... (2 Replies)
Hello, I have a file in the following format
id sample platform R1 R2 gene1 gene2 gene3
1 abc llumina R1_001.fastq.gz R2_001.fastq.gz apoe prnpp asp
2 def llumina R1_001.fastq.gz R2_001.fastq.gz apoe prnpp
3 ghi llumina ... (3 Replies)
Discussion started by: nans
3 Replies
LEARN ABOUT REDHAT
vmstat
VMSTAT(8) Linux Administrator's Manual VMSTAT(8)NAME
vmstat - Report virtual memory statistics
SYNOPSIS
vmstat [-n] [delay [ count]]
vmstat[-V]
DESCRIPTION
vmstat reports information about processes, memory, paging, block IO, traps, and cpu activity.
The first report produced gives averages since the last reboot. Additional reports give information on a sampling period of length delay.
The process and memory reports are instantaneous in either case.
Options
The -n switch causes the header to be displayed only once rather than periodically.
delay is the delay between updates in seconds. If no delay is specified, only one report is printed with the average values since boot.
count is the number of updates. If no count is specified and delay is defined, count defaults to infinity.
The -V switch results in displaying version information.
FIELD DESCRIPTIONS
Procs
r: The number of processes waiting for run time.
b: The number of processes in uninterruptable sleep.
w: The number of processes swapped out but otherwise runnable. This
field is calculated, but Linux never desperation swaps.
Memory
swpd: the amount of virtual memory used (kB).
free: the amount of idle memory (kB).
buff: the amount of memory used as buffers (kB).
Swap
si: Amount of memory swapped in from disk (kB/s).
so: Amount of memory swapped to disk (kB/s).
IO
bi: Blocks sent to a block device (blocks/s).
bo: Blocks received from a block device (blocks/s).
System
in: The number of interrupts per second, including the clock.
cs: The number of context switches per second.
CPU
These are percentages of total CPU time.
us: user time
sy: system time
id: idle time
NOTES
vmstat does not require special permissions.
These reports are intended to help identify system bottlenecks. Linux vmstat does not count itself as a running process.
All linux blocks are currently 1k, except for CD-ROM blocks which are 2k.
FILES
/proc/meminfo
/proc/stat
/proc/*/stat
SEE ALSO ps(1), top(1), free(1)BUGS
Does not tabulate the block io per device or count the number of system calls.
AUTHOR
Written by Henry Ware <al172@yfn.ysu.edu>.
Throatwobbler Ginkgo Labs 27 July 1994 VMSTAT(8)