Presumably you have some values for regx and presumably you are having some sort of IP list function valid_ip(){ ip=$1 if [[ $ip =~ ^$regx\.$regx\.$regx\.$regx$ ]]; then return 0 else return 1 fi } 0 solved validating IP in bash, CentOS
perl -wpe’s!”([^”]*)”!”<blue>$1</blue>”!g’ filename 4 solved Search and replace value in-between quotes [closed]
Requires bash4 (tested with 4.3.48). Assuming you never want a upper case character in the value of the variable output, I would propose the following: typeset -l output output=${input// /_} typeset -l output: Defines the variable to be lowercase only. From man bash: When the variable is assigned a value, all upper-case characters are converted … Read more
This is a simple extension of Iterate over two arrays simultaneously in bash, combined with How to split a string into an array in bash. IFS=, read -ra sbi_arr <<<“$SBI” # convert SBI string to an array IFS=, read -ra mem_arr <<<“$MEM” # convert MEM string to an array out= # initialize output variable for … Read more
By doing ((aStr = $(printf %03d $a))), you are destroying again the careful formatting done by printf. You would see the same effect if you do a (( x = 005 )) echo $x which outputs 5. Actually the zeroes inserted by printf could do harm to your number, as you see by the following … Read more
I think this question is fine now, the input file is good enough after edit, I can fully understand what you ask for now. With awk, you need learn to use 2-d array, it will simplify the code. awk ‘BEGIN{print “Instance id Name Owner Cost.centre”} /TAG/{split($0,a,FS);a[4]=tolower(a[4]);$1=$2=$3=$4=””;b[a[3],a[4]]=$0;c[a[3]]} END{for (i in c) printf “%-18s%-26s%-14s%-20s\n”,i,b[i,”name”],b[i,”owner”],b[i,”cost.center”]}’ file Instance id … Read more
A simple example: echo {1..19..2}; echo {2..20..2}; echo {21..39..2}; echo {22..40..2} In a loop: #!/bin/bash i=1 while [ “$i” -lt 4000 ]; do for j in $i $((i+1)); do printf ‘%s ‘ $( seq $j 2 $((j+18)) ); echo done i=$((i+20)) done 2 solved bash print 10 odd numbers then 10 even numbers [closed]
In order to configure the environment for your subsequent ant command, you have to include the “. ./setantenv.sh” inside your second call. Both calls result in independent bash processes that dont share their specific environment. try this: su – USER -s /bin/bash -c ‘cd /PATH/ && . ./setantenv.sh && ant clean all’ 0 solved Linux, BASH … Read more
You can do this: seq 100 | egrep -v “0$|5$” basically it looks for and removes (-v) any line ending in 0 or 5. 4 solved Printing numbers from one list, not found in another
use CGI qw(:standard); use File::Basename; my ( $name, $path, $extension) = fileparse ( $productimage, ‘..*’ ); $productimage = $name . $extension; $productimage =~ tr/ /_/; $productimage =~ s/[^$safechars]//g; if ( $productimage =~/^([$safechars]+)$/ ) { $productimage = $1; } else { die “Filename contains invalid characters”; } $fh = upload(‘image’); $uploaddir = “../../.hidden/images”; open ( UPLOADFILE, … Read more
~$ echo one && echo two This runs the 2. command only if the first command succeeds. ~$ echo one ; echo two This always runs the 2. command. ~$ echo one || echo two This runs the 2. command only if the first command fails. A command is considered successful if its exit code … Read more
$ cat tst.awk BEGIN { FS = “[\t|]” } NR==FNR { for (i=1; i<=3; i++) { if ($i == “”) { $i = “N.A.” } } a[$1 OFS $2 OFS $3] next } !(($3 OFS $5 OFS $6) in a) $ awk -f tst.awk file1 file2 123|234|aa|ur29842|b|c|234|567 123|234|aa|ur2909842|bb|ccc|234|567 123|234|aaa|ur29042842|bb|cc|234|567 123|234|N.A.|ur2922|bbb|cccc|234|567 0 solved Remove lines from … Read more
sed ‘s/\(\b\)\(\w\)\(\w\)\(\w\)\(\b\)/\1\4\3\2\5/g’ input_file 3 solved replacing letters in a word at his reverse sed [closed]
You can use the backtick operator to delimit a command – it will return the result of the command. For example: output = `ls /usr/` => “X11\nX11R6\nadic\nbin\nlib\n” puts output X11 X11R6 adic bin lib solved How to use single quotes inside single quots to run bash script from ruby controller
The command is installed as $HOME/go/bin/shfmt (unless GOBIN is set, then it’s $GOBIN/shfmt): $ go help install usage: go install [-i] [build flags] [packages] Install compiles and installs the packages named by the import paths. Executables are installed in the directory named by the GOBIN environment variable, which defaults to $GOPATH/bin or $HOME/go/bin if the … Read more