Shell Scripts 구문

#!/bin/sh

### ---

if [[ $# -ne 3 ]]

then

   echo 'Usage: aShell.sh <logname> <interval:second> <duration:minute>'

   # exit

fi

### ---

if [[ $1 -lt 5 ]]

then

   echo 'args[1] is smaller than 5'

   # exit

fi

### ---

cd /home

for home in *

        do echo "- ${home} ---"

        ls -alrt ${home}

done

### ---

hostnm=`hostname`

if [ `hostname` = "localhost" ]

then

        echo "changed hostname with 'smitty hostname'"

elif [ `hostname` = "apple" ]

then

        echo "hostname is apple"

else

        echo "hostname is "${hostnm}

fi

### ---

DATE=`date +"%y%m%d_%H%M"`

### ---

ins=1

inx=3

while [ ${ins} -le 5 ]

do

        echo "while looping " ${inx}

        sleep 1

        (( ins=${ins}+1 ))

        inx=${inx}+1

        echo ${ins}  "   " ${inx}

done

echo ">>>>>>>>>>>>>>>>"

print ${inx}

unset inx

echo "---"

print ${inx}

echo ">>>>>>>>>>>>>>>>"

### ---

read proceed?"proceed? (y/n)"

if [[ ${proceed} == "n"  || ${proceed} == "N" ]]

then

        echo "stop"

        exit

fi

echo "proceed"

 

### ---

initial_count=1

max_count=5

while (( ${initial_count} <= ${max_count} ))

do

        (( initial_count = ${initial_count} + 1 ))

done

echo ${initial_count}

### ---

# if [[ $# -ne 2 ]]

# then

#       echo 'Usage: rmhdisk.sh <hdisk#-start> <hdisk#-end>'

#       exit

# fi

# i=$1

# while [ $i -le $2 ]

# do

#       echo "removing hdisk${i}"

#       rmdev -Rdl hdisk$i

#       ((i=i+1))

# done

### ---

ls -alrt  | grep -v grep | awk '{print "file " $9}' | sh -x

### ---

for oddnum in 1 3 5 7 9

do print ${oddnum}

sleep 1

done

### --- 

find /usr/bin -type f |sort | xargs ls -l | awk '{print $1 " " $NF}' > permission.txt