Guys,
I need some advice on how to check a string, which may or may not have a entry.. Never really worked out how to do this.. May be a good time to learn now.
This is what i am trying to do
Run a command, to return a string
If the string is not empty , then run the if statement, otherwise ignore
How can i write the code, so it does not give out a error message. in the form of " [: argument expected"
hi,
I have a variable var1 as follows in the script.
var1="one two three desformat=PDF xyz"
I would like to check whether $var1 has a string "desformat=PDF" or not.
Is there any command I can use (not need to creat a file)?
Currently, I am using this:
if ( grep "desformat=PDF"... (1 Reply)
Hi I want to implement the nice command in the shell that I am building. I came to know that there is a corresponding nice() system call for the same. But since I will be forking different processes to run different commands typed on the command prompt, is there any way I can make a command... (2 Replies)
Hello All,
Plz help me with:
I have a csv file with data separated by ',' and optionally enclosed by "". I want to check each of these values to see if they exceed the specified string length, and if they do I want to cut just that value to the max length allowed and keep the csv format as it... (9 Replies)
how can i check whether variable contains only character from a-z or A-Z....if my variable contains any alpha numeric, numeric or any character with some special one i.e. *%&@! etcetera etcetera....then it should show me please enter only characters......
Let my variable
var1="abc77}|"
then... (9 Replies)
Hi,
how to check the given string is numeric or not , without converting ( using strtol...).
for ex: if string is C01 - non-numeric data
if string is 001 - numeric data
TIA (11 Replies)
I want to search a file to check if there is string a before string b:
string a, b might not necessarily be in the file, and to return a boolean
string a
(any text)
string b
i have tried for an hour to do this with perl, grep, etc. but no luck
grep doesnt search for patterns... (7 Replies)
I want to check if the string is WINDOWS-1251 or UTF-8
can you help me to find the string encoding???
or maybe to get URL Content-Type charset with wget?
this is my function on PHP
function check_utf8($str) {
$len = strlen($str);
for($i = 0; $i < $len; $i++){
$c =... (2 Replies)
I want to append file with a string but before doing that i want to check if this string already exist in that file.I tried with grep on Solaris 10 but unsuccessful.Man pages from grep seems to suggest if the string is found command status will be 0 and if not 1.But i am not finding it.May be i... (2 Replies)
Hello
So i have that script collection, in which i have a single script to create a configuration file.
In there, i have multiple occourences of something like this:
prj_title=$(tui-read "What is the TITLE? ($prj_name):")
] && prj_title="${prj_name/_/ }"
They all work as expected, if... (5 Replies)
Discussion started by: sea
5 Replies
LEARN ABOUT PHP
nice
NICE(1) User Commands NICE(1)NAME
nice - run a program with modified scheduling priority
SYNOPSIS
nice [OPTION] [COMMAND [ARG]...]
DESCRIPTION
Run COMMAND with an adjusted niceness, which affects process scheduling. With no COMMAND, print the current niceness. Niceness values
range from -20 (most favorable to the process) to 19 (least favorable to the process).
Mandatory arguments to long options are mandatory for short options too.
-n, --adjustment=N
add integer N to the niceness (default 10)
--help display this help and exit
--version
output version information and exit
NOTE: your shell may have its own version of nice, which usually supersedes the version described here. Please refer to your shell's docu-
mentation for details about the options it supports.
AUTHOR
Written by David MacKenzie.
REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report nice translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO nice(2), renice(1)
Full documentation at: <http://www.gnu.org/software/coreutils/nice>
or available locally via: info '(coreutils) nice invocation'
GNU coreutils 8.28 January 2018 NICE(1)