Hi Friends
I have a file
like
sample1.txt
------------
10998909.txt
10898990.txt
1898772222.txt
8980000000000.txt
I need to take first 3 characters of each line in a file and i need to print it '
like loop
109
108
189
898 (7 Replies)
I know this sounds simple, but I have a logfile with
> something
> something_else
> another_entry
...
how do I cut the first 2 characters off the left side? I tried to use
cut -c 1-2 somefile > someotherfile
but that just cut gave me the 2 left characters, I want to cut those out... (2 Replies)
Hi All,
Need to convert file names to upper case using tr command in Unix.
In a folder -> /apps/dd01/misc
there are two files like:
pi-abcd567sd.pdf
pi-efgh1.pdf
The output of should be like:
pi-ABCD567SD.pdf
pi-EFGH1.pdf
I have used the command to work as below:
for f... (3 Replies)
Guys,
can you help me in doing cut first 21 and 32-35 characters from file.
I tried with cut -c to cut first 21 characters ,It is succeeded.
But i need both first 21 and 32-35. (1 Reply)
hello everybody
i am looking for a shell to cut a flat file (with a long unique line) according to a certain number of characters and redirect every result to an output file.
here is an example
MyFile :
12 3 456 12 3 456 12 3 456 .....
and i took every 9-characters including BLANKS... (6 Replies)
Hi Gurus,
I am trying to execute the below command. However the output shows the value + path of the folder where the command is being executed. But I am only interested in the value but not the path.
du -hs /aps/inf/SeLogs
when I execute the above command, output is
32G... (5 Replies)
I need to cut the last seven characters of a variable length variable. The variable may be 7 characters or 70. I need to always be able to grab the last 7 characters. I looked at the cut command but it always seems to want to start at the beginning of a line, not the end and count backwards.
... (5 Replies)
Hi,
I would like to cut last 13 characters of a file name and take the rename the file name as follows:
Input:
A.DAT20110517033732
Output:
A.DAT
I have tried the following command and cut last 13 characters.
echo A.DAT20110517033732 | awk '{print substr($0, length($0)-13)}'
... (3 Replies)
Hi Everyone,
i have a file 1.txt
<a><a"" dd>aaaaauweopriuew</f><">!(^)!</aa></ff>
<a><a"" dd>bbbbbuweopriuew</f><">!(^*)!</aa></ff>
i know i can use
perl -p -i -e "s/>aaaaa/aa/g" 1.txt
perl -p -i -e "s/>bbbbb/bb/g" 1.txt
to acheive only keep the first two characters of the five characters,... (4 Replies)
Discussion started by: jimmy_y
4 Replies
LEARN ABOUT NETBSD
flock
FLOCK(1) BSD General Commands Manual FLOCK(1)NAME
flock -- Provide locking API for shell scripts
SYNOPSIS
flock [-dnosvx] [-w timeout] lockfile|lockdir [-c command] | [command ...]
flock [-dnsuvx] [-w timeout] lockfd
DESCRIPTION
The flock utility provides flock(2) access to the command line or scripts. The first form locks a file or directory while the command pro-
vided is executed. If the file or directory does not exist, then a file is created.
The second form can use an arbitrary file descriptor that is provided from a shell script for example:
(
flock -s 100
# commands to be executed under the lock
) 100> /path/to/lockfile
The following options are available:
-c command Pass a command to a the shell.
-d, --debug Provide debugging output.
-n, --nb, --nonblock
Don't block and fail immediately if the lock could not be obtained.
-o, --close Close the file before executing the command. This is useful if the child forks and should not be holding the lock.
-s, --shared Obtain a shared lock.
-u, --unlock Unlock an existing lock. This is available only for a file descriptor.
-v, --verbose On error print an explanation of the failure.
-w, --wait, --timeout seconds
Fail if the lock could not be obtained after seconds.
-x, --exclusive Obtain an exclusive lock.
EXIT STATUS
The flock utility exits 0 on success, and >0 if an error occurs.
SEE ALSO shlock(1), flock(2)HISTORY
An flock utility appeared in NetBSD 6.1.
BSD November 2, 2012 BSD