TIME(1) General Commands Manual TIME(1)NAME
time - time a command
SYNOPSIS
time command
DESCRIPTION
The given command is executed; after it is complete, time prints the elapsed time during the command, the time spent in the system, and the
time spent in execution of the command. Times are reported in seconds.
The execution time can depend on what kind of memory the program happens to land in; the user time in MOS is often half what it is in core.
The times are printed on the diagnostic output stream.
BUGS
Elapsed time is accurate to the second, while the CPU times are measured to the 60th second. Thus the sum of the CPU times can be up to a
second larger than the elapsed time.
TIME(1)
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TIME(1) BSD General Commands Manual TIME(1)NAME
time -- time command execution
SYNOPSIS
time [-clp] command [argument ...]
DESCRIPTION
The time utility executes and times command. After the command finishes, time writes the total elapsed time (wall clock time), (``real''),
the CPU time spent executing command at user level (``user''), and the CPU time spent executing in the operating system kernel (``sys''), to
the standard error stream. Times are reported in seconds.
Available options:
-c Displays information in the format used by the time builtin of csh(1).
-l Lists resource utilization information. The contents of the command process's rusage structure are printed; see below.
-p The output is formatted as specified by IEEE Std 1003.2-1992 (``POSIX.2'').
Some shells, such as csh(1) and ksh(1), have their own and syntactically different built-in version of time. The utility described here is
available as /usr/bin/time to users of these shells.
Resource Utilization
If the -l option is given, the following resource usage information is displayed in addition to the timing information:
maximum resident set size
average shared memory size
average unshared data size
average unshared stack size
page reclaims
page faults
swaps
block input operations
block output operations
messages sent
messages received
signals received
voluntary context switches
involuntary context switches
Resource usage is the total for the execution of command and any child processes it spawns, as per wait4(2).
FILES
<sys/resource.h>
EXIT STATUS
The time utility exits with one of the following values:
1-125 An error occurred in the time utility.
126 The command was found but could not be invoked.
127 The command could not be found.
Otherwise, the exit status of time will be that of command.
SEE ALSO csh(1), ksh(1), clock_gettime(2), getrusage(2)STANDARDS
The time utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').
BUGS
The granularity of seconds on microprocessors is crude and can result in times being reported for CPU usage which are too large by a second.
BSD November 9, 2011 BSD
Hi All,
I have a situation where I need to copy the files having the latest date.
For example I have a file by name bas100e1_jun05. I need to copy it to bas100e1. But when a file by name bas100e1_jul05 is put in the same directory the script should copy the file having the latest month which... (34 Replies)
Matez,
I have a list of process id's in a text file. I want to know how to find the idle time of a process which are more than 300secs and kill them accordingly.
Could you please help me to get these details. I want to write a shell script with this.
Thanks..Krish :) (36 Replies)
Can someone suggest on this script :
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the script should identify the latest months logs, i.e Jan 07
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All,
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Simple question , where did you meet UNIX OS-es.
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I have a few log files which get generated on a daily basis..So, I need to pick only the ones which get generated for that particular day.
-rw-r--r-- 1 staff 510732676 Apr 7 22:01 test.log040711
-rwxrwxrwx 1 staff 2147482545 Apr 7 21:30 test.log.2
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I have created this script
#!/bin/sh
FILES=/data/log/access_*.log
for f in $FILES
do
echo "Processing $f file"
cat $f | awk '{print $1}' | sort | uniq -c | sort -n | tail
done
It produces this output
Processing /data/log/access_abc.log file
114 1.1.1.1
167 2.2.2.2
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My original files are like this below and I distinguish them from the AP_ID (file1 has 572 and file2 has 544). Also, the header on file1 has “G_” pre-pended. NOTE: these are only snippets of very large files and much of the data is not present here.
Original File 1:
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