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df -h | grep '[6-9][0-9]%\|100%' will grep anything with 60% or more usage

Pure awk-solution for each vowel separately. #define array vowels with one vowel for each index BEGIN{ split("aeiou",vowels,"") } #in each line, make line lowercase {$0=tolower($0) #for each vowel oc …

A possible alternative could be a simple expect script: #!/usr/bin/expect spawn bluetoothctl send "scan on\r" sleep 10 send "quit \r" expect eof \r equals "Return / pressing enter". Make execut …

First of all: bash can only handle integer numbers. So you need to make use of an external too for the floating point comparison. A simple way would be using bc, which outputs 0 on FALSE statements, a …

In man bash it says: wait [-fn] [id ...] Wait for each specified child process and return its termination status. Each id may be a process ID or a job specification; if a job spec is given, all proc …

With dd Extract parts by skipping blocks. dd bs=32 count=1 skip=1 if=file5 | diff - file2 Increase the number of skipped blocks accordingly to match the other files. With split The files are sma …

for avoiding an intermediate file, use: paste <( awk -F, '{ print $8 }' original_file1 ) <( awk -F, '{ print $8 }' original_file2 ) | awk '{print $1+$2}' > file3

using sed sed 's/^[0-9]/chr&/' file

With bash you can do as follows: #!/bin/bash #let's look for an a in our handful of files string="a" for file in aa ab bb cc dd ad ; do #note the placement of the asterisks and the quotes #do not …

The read command takes the variable, but you already are referring to the values of the variable: #correct syntax read variable #wrong syntax read $variable $variable is the value of variable a …

Maybe a combination of paste and seq can be simpler: paste datafile <( seq 0 50 $(( ($(wc -l datafile | cut -d' ' -f1 )-1)*50 )) ) > output The last value for seq is just based on the line numbers …

GNU sed allows specifying which occurence of a pattern (in a line) should be replaced: First (default) echo AAAAA | sed 's/A/X/' XAAAA All echo AAAAA | sed 's/A/X/g' XXXXX i-th echo AAAAA | se …

I assume rename (perl-rename on some systems, just rename on others) is simplest here: rename 's/^awstats\.//;s/\.conf$//' awstats.*.conf Explanation of the regex: s/^awstats\.// substitute awsta …

You could use the [[:alnum:]] class that stands for letters and digits: $p =~ ^[[:alnum:]]+\.[[:alnum:]]+\.[[:alnum:]]+\.[[:alnum:]]+$

I think you are better off using grep and GetLocalCit as list of search strings: grep -f GetLocalCit GetLocalNurse Or if they are commands rather than files grep -f <(GetLocalCit) <(GetLocalNurse) …