02-17-2017
Just guessing that you are not running a (recent) bash for your "substring expansion" ${firstLine:0:3} as it is the usual syntax and should work. ${cut -c1-8} should be a "command substitution" in the syntax $(cut -c1-8) but needs an input file to work upon.
This User Gave Thanks to RudiC For This Post:
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi Friends,
Can any of you explain me about the below line of code?
mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`
Im not able to understand, what exactly it is doing :confused:
Any help would be useful for me.
Lokesha (4 Replies)
Discussion started by: Lokesha
4 Replies
2. Shell Programming and Scripting
im a new student in programming and im stuck on this question so please please HELP ME. thanks.
the question is this:
enter a command to delete all files that have filenames starting with labtest, except labtest itself (delete all files startign with 'labtest' followed by one or more... (2 Replies)
Discussion started by: soccerball
2 Replies
3. Shell Programming and Scripting
Hi All ,
I want to delete files from /tmp directory created by "xxxx" id.
because i got the list says more than 60 thousand files were created by "xxxx" id since 2002.
The /tmp directory has lot of files created by different user ids like root,system etc..
But, i need a script to... (2 Replies)
Discussion started by: vparunkumar
2 Replies
4. Shell Programming and Scripting
I wrote a script to delete files which are older than "x" days, if the size of the directory is greater than "y"
#!/bin/bash
du -hs $1
while read SIZE ENTRY
do
if ;
then
find $1 -mtime +$2 -exec rm -f {} \;
echo "Files older than $2 days deleted"
else
echo "free Space available"... (4 Replies)
Discussion started by: JamesCarter
4 Replies
5. Shell Programming and Scripting
Hi,
I have line in input file as below:
3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL
My expected output for line in the file must be :
"1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL"
Can someone... (7 Replies)
Discussion started by: shis100
7 Replies
6. Shell Programming and Scripting
logs:
"/home/abc/public_html/index.php"
"/home/abc/public_html/index.php"
"/home/xyz/public_html/index.php"
"/home/xyz/public_html/index.php"
"/home/xyz/public_html/index.php"
how to use "cut" or "awk" or "sed" to get the following result:
abc
abc
xyz
xyz
xyz (8 Replies)
Discussion started by: timmywong
8 Replies
7. Shell Programming and Scripting
Hello.
Following recommendations for one of my threads, this is working perfectly :
#!/bin/bash
CNT=$( grep -c -e "some text 1" -e "some text 2" -e "some text 3" "/tmp/log_file.txt" )
Now I need a grep success for some thing like :
#!/bin/bash
CNT=$( grep -c -e "some text_1... (4 Replies)
Discussion started by: jcdole
4 Replies
8. Shell Programming and Scripting
I have a bunch of random character lines like ABCEDFG. I want to find all lines with "A" and then change any "E" to "X" in the same line. ALL lines with "A" will have an "X" somewhere in it. I have tried sed awk and vi editor. I get close, not quite there. I know someone has already solved this... (10 Replies)
Discussion started by: nightwatchrenba
10 Replies
9. Shell Programming and Scripting
find "*.c" and "Makefile" and then delete them with one line (3 Replies)
Discussion started by: yanglei_fage
3 Replies
10. Shell Programming and Scripting
Hello.
System : opensuse leap 42.3
I have a bash script that build a text file.
I would like the last command doing :
print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt
where :
print_cmd ::= some printing... (1 Reply)
Discussion started by: jcdole
1 Replies
LEARN ABOUT PHP
mb_strcut
MB_STRCUT(3) 1 MB_STRCUT(3)
mb_strcut - Get part of string
SYNOPSIS
string mb_strcut (string $str, int $start, [int $length = NULL], [string $encoding = mb_internal_encoding()])
DESCRIPTION
mb_strcut(3) extracts a substring from a string similarly to mb_substr(3), but operates on bytes instead of characters. If the cut position
happens to be between two bytes of a multi-byte character, the cut is performed starting from the first byte of that character. This is
also the difference to the substr(3) function, which would simply cut the string between the bytes and thus result in a malformed byte
sequence.
PARAMETERS
o $str
- The string being cut.
o $start
- Starting position in bytes.
o $length
- Length in bytes. If omitted or NULL is passed, extract all bytes to the end of the string.
o $encoding
-The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used.
RETURN VALUES
mb_strcut(3) returns the portion of $str specified by the $start and $length parameters.
SEE ALSO
mb_substr(3), mb_internal_encoding(3).
PHP Documentation Group MB_STRCUT(3)