Hi Everybody,
Can you explain the difference between the following commands:
1. find . -print|xargs grep -i dba_2pc_pending
2. find . -print|grep -i dba_2pc_pending (5 Replies)
what is the real use of xargs command ..?
ls -tr |xargs -I{} rm -f {}
....can any one tell me what is the significance of {} curly brackets in this command (1 Reply)
Hi
I am trying to use "xargs" command to loop through each file, modify it and overwrite the old file with the modification but with the same file name.
I thought it is easy but I just can't get it to work
I tried the following
I thought {} would give me the current file name, but it... (1 Reply)
Hi
The command below does not work. what I am doing wrong ?
For some reason second part of the xargs command is not does what I expect
If I get this working I intend to use it for multiple file rename later.
echo archDP105144_1_702159963.dbf|xargs -i cp {} `echo {}|awk... (11 Replies)
Hi,
What is the difference in capitalizing the option 'i' of xargs command, (i.e) xargs -i and xargs -I?
Also, what is the difference between the below 2 commands?
output_from_cmd | xargs -I {} grep '{}' file
output_from_cmd | xargs -I grep '{}' file
Any efficiency or performance... (4 Replies)
ls -lrt | awk '$7==12{print $9}' | xargs -i mv {} $dir
i executed this command but $dir does not exists.......
and the files hv been moved but i dont know where .....
plz help(ASAP)
thanks in advance. (8 Replies)
Linux top command prints more than 40 processes.
top -b -n 1 > Top_Output.txt
Is there a straight-forward option/way to limit only till the top 5 processes.
( Instead of using head, tail or other unix commands together) (1 Reply)
xargs work great when a command gives multiple line output which can be input to another. In my case it is not working coz the second command uses two words in it.
$ scr.sh
gives output like
193740
638102
375449
..
..
another command takes these number as inputs. it works great... (1 Reply)
ls | grep -E '^+$' | xargs --verbose -I{} rm -vfr "{}";
When i execute the command it works fine by removing the directories and its writing the output as below about which files are deleting.What i want know is,is there any XARGS command option that it should done silently in background with... (2 Replies)
Hi,
I am working on a file copier utility where I have written the copy commands to a batch file e.g. file_copier.bat which i pass to xargs command as follows.
cat file_copier.bat | xargs -n 1 -P 40
I also want to record the copy command status of each file/command in the form "command... (1 Reply)
Discussion started by: ankur singh
1 Replies
LEARN ABOUT OPENDARWIN
touch
TOUCH(1) BSD General Commands Manual TOUCH(1)NAME
touch -- change file access and modification times
SYNOPSIS
touch [-acfhm] [-r file] [-t [[CC]YY]MMDDhhmm[.SS]] file ...
DESCRIPTION
The touch utility sets the modification and access times of files to the current time of day. If the file doesn't exist, it is created with
default permissions.
The following options are available:
-a Change the access time of the file. The modification time of the file is not changed unless the -m flag is also specified.
-c Do not create the file if it does not exist. The touch utility does not treat this as an error. No error messages are displayed and
the exit value is not affected.
-f Attempt to force the update, even if the file permissions do not currently permit it.
-h If the file is a symbolic link, change the times of the link itself rather than the file that the link points to. Note that -h
implies -c and thus will not create any new files.
-m Change the modification time of the file. The access time of the file is not changed unless the -a flag is also specified.
-r Use the access and modifications times from the specified file instead of the current time of day.
-t Change the access and modification times to the specified time. The argument should be in the form ``[[CC]YY]MMDDhhmm[.SS]'' where
each pair of letters represents the following:
CC The first two digits of the year (the century).
YY The second two digits of the year. If ``YY'' is specified, but ``CC'' is not, a value for ``YY'' between 69 and 99
results in a ``CC'' value of 19. Otherwise, a ``CC'' value of 20 is used.
MM The month of the year, from 1 to 12.
DD the day of the month, from 1 to 31.
hh The hour of the day, from 0 to 23.
mm The minute of the hour, from 0 to 59.
SS The second of the minute, from 0 to 61.
If the ``CC'' and ``YY'' letter pairs are not specified, the values default to the current year. If the ``SS'' letter pair is not
specified, the value defaults to 0.
DIAGNOSTICS
The touch utility exits 0 on success, and >0 if an error occurs.
SEE ALSO utimes(2)COMPATIBILITY
The obsolescent form of touch, where a time format is specified as the first argument, is supported. When no -r or -t option is specified,
there are at least two arguments, and the first argument is a string of digits either eight or ten characters in length, the first argument
is interpreted as a time specification of the form ``MMDDhhmm[YY]''.
The ``MM'', ``DD'', ``hh'' and ``mm'' letter pairs are treated as their counterparts specified to the -t option. If the ``YY'' letter pair
is in the range 39 to 99, the year is set to 1939 to 1999, otherwise, the year is set in the 21st century.
HISTORY
A touch utility appeared in Version 7 AT&T UNIX.
STANDARDS
The touch utility is expected to be a superset of the IEEE Std 1003.2 (``POSIX.2'') specification.
BSD April 28, 1995 BSD