I've made an awk command that works successfully.
However I'd like to add one character to it.
For example instead of /what_i_have_now/
I'd like to change just ONE field to the opposite with an exclamation point.
Like this: ! /what_i_have_now/
My question, where am I supposed to place... (1 Reply)
Ok. I'm just starting to use AWK and I have a question. Here's what I'm trying to do:
uname -n returns the following on my box:
ftsdt-svsi20.si.sandbox.com
I want to pipe this to an AWK statement and make it only print:
svsi20
I tried:
uname -n | awk '{ FS = "." ; print $1 }'
... (5 Replies)
Ok, this may be very simple but I can't find a solution. I have a list of numbered values which I have grepped from a larger life.
ex/
1:7.54
2:4.52
3:3.22
4:2.11
5:3.59
6:4.36
7:6.88
8:12.28
9:13.37
10:15.6
11:17.66
12:14.25
I need a quick way to organize them (using awk?)... (4 Replies)
Hi fellow linux-ers,
I have a quick question for you. I have the following text, which I would like to modify:
10 121E(121) 16 Jan
34S 132E 24 Feb
42 176E(176) 18 Sep
21S 164E 25 May
15 171W(-171) 09 Jul
How can I do the following 2 modifications using sed and/or awk?
1. in 1st column,... (1 Reply)
Hi Experts,
I am trying to print $2 & the IP_address upto 3rd octet only.
But unable to do so, Trying # awk '{print $2, substr($4,1,9)}' file . but not correct
File:
HOST= cmiHOST06 :: 10.26.107.73:/data120 /nbu/cmiHOST06/athpx07/aa1
HOST= cmiHOST05 :: 10.26.12.76:/data120... (5 Replies)
How to write in awk to remove lines starting with "#" and then process the file:
This is not working:
cat file|awk '{if ($0 ~ /^#/) $0="";print NF>0}'
When I just give cat file|awk '{if ($0 ~ /^#/) $0="";print }'
it prints the blank lines . I don't wnat the blank lines along with the... (15 Replies)
Example:
$ cat file1
2
3$ cat file2
1
2
3
4
5
6The following awk script works like a charm, NR==FNR is true for file1, the remainder runs for file2:
awk '
NR==FNR {A; next}
($1 in A)
' file1 file2
2
3Now have an empty file1:
>file1and run the awk script again.
The result is empty... (8 Replies)
gawk 'BEGIN{count=0} /^Jan 5 04:33/,0 && /fail/ && /09x83377/ { count++ } END { print count }' /var/log/syslog
what is wrong with this code? i want to search the strings "fail" and "09x83377" from all entries. im grabbing all entries in the log starting from Jan 5 04:33 to the end of the... (3 Replies)
Discussion started by: SkySmart
3 Replies
LEARN ABOUT PHP
is_writable
IS_WRITABLE(3) 1 IS_WRITABLE(3)is_writable - Tells whether the filename is writableSYNOPSIS
bool is_writable (string $filename)
DESCRIPTION
Returns TRUE if the $filename exists and is writable. The filename argument may be a directory name allowing you to check if a directory
is writable.
Keep in mind that PHP may be accessing the file as the user id that the web server runs as (often 'nobody'). Safe mode limitations are not
taken into account.
PARAMETERS
o $filename
- The filename being checked.
RETURN VALUES
Returns TRUE if the $filename exists and is writable.
EXAMPLES
Example #1
is_writable(3) example
<?php
$filename = 'test.txt';
if (is_writable($filename)) {
echo 'The file is writable';
} else {
echo 'The file is not writable';
}
?>
ERRORS /EXCEPTIONS
Upon failure, an E_WARNING is emitted.
NOTES
Note
The results of this function are cached. See clearstatcache(3) for more details.
Tip
As of PHP 5.0.0, this function can also be used with some URL wrappers. Refer to "Supported Protocols and Wrappers" to determine
which wrappers support stat(3) family of functionality.
SEE ALSO is_readable(3), file_exists(3), fwrite(3).
PHP Documentation Group IS_WRITABLE(3)