Shell Script Job

(1) Write a script: If a path does not exist, it is created as a directory, otherwise it is present, and the content type is displayed

#!/bin/bash#if [$#-lt 1]; Then echo "Plz Enter a path:" Exit 1fi if [-e $]; Then file $1else mkdir-p $1fi ~

Test script:

[[email protected] bin]# Bash Test20.shplz Enter a path:[[email protected] bin]# bash-x test20.sh abc+ ' [' 1-lt 1 '] ' + ' ['-e abc '] ' + mkdir-p abc[[email protected] bin]# bash-x test20.sh abc+ ' [' 1-lt 1 '] ' + ' ['-e-ABC '] ' + file Abcabc: Directory

(2) Write a script to complete the following functions, to determine the given two values, whichever is smaller; the method of the given number: script parameter, command interaction;

#!/bin/bash#if (($# < 2));  Then echo "Plz enter Numbers!" Exit 1fi if (($ > $)); Then echo "$ > $" elif (($ < $)); Then echo "$ < $" Elif (($ = = $)); Then echo "$ = $" else echo "disparate" fi~

Test scripts

[Email protected] bin]# bash test21.shplz enter the integer numbers! [[email protected] bin]# Bash test21.sh 4Plz enter the integer numbers! [[email protected] bin]# Bash test21.sh 4 < 5[[email protected] bin]# bash test21.sh 5 = 5[[email protected] bin] # bash test21.sh 5 > 4

(3) the sum of all odd numbers within the range (at least 3 methods)

1. use the For

#!/bin/bash#for i in $ (seq 100); do if [$[$i%2]-ne 0]; Then h=$[$h + $i] fidone echo "sum: $h"

Test script:

[Email protected] bin]# bash test22.shsum:2500

2. Using the While

#!/bin/bash#h=1j=0while [$h-le 100]; do if [$[$h%2]-ne 0]; Then j=$[$h + $j] fi leth++doneecho $j

Test script:

[Email protected] bin]# bash test23.sh2500

3. temporarily unexpected

(4) write a script to achieve the following functions :

(1) Pass two text file path to script;

(2) Show the number of blank lines in two files and their blank lines;

#!/bin/bash# if [ $# -lt 2 ]; then  echo  "Plz enter  two path: "  exit 1fi if [ ! -f $1 ]; then   echo  "$1 not a common file!"   exit 1fiif [ ! -f $2 ]; then  echo  "$2 not  a common file! "   exit 1fij=$ (grep -c  "^$"  $1) h=$ (grep -c  "^$"  $2) m=$ (cat $1  |wc -l) n=$ (cat $2 |wc -l) if [  $j  -ge  $h  ]; then   echo  "$1 is max ,the spaceline total: $j" else  echo  "$  is max, the spaceline total: $h "fiif [  $m  -ge  $n  ];  then  echo  "$1 is max, the lines total: $m"  else  echo   "$2 is max,the lines tOtal: $n "fi 

Test script:

[[email protected] bin]# bash -x test24.sh/etc/fstab /etc/yum.conf+  ' ['  2 -lt 2  ' ' +  ' ['   '! '  -f /etc/fstab  ' ' +  ' ['   '! '  -f /etc/yum.conf  ' ++ grep -c  ' ^$ '  /etc/fstab+ j=1++ grep  -c  ' ^$ '  /ETC/YUM.CONF+ H=3++ WC -L++ CAT /ETC/FSTAB+ M=10++ WC  -l++ cat /etc/yum.conf+ n=26+  ' ['  1 -ge 3  '] ' + echo  '/ Etc/yum.conf is max, the spacelinetotal:3 '/etc/yum.conf is max, the  spaceline total:3+  ' ['  10 -ge 26  '] ' + echo  '/etc/yum.conf is  max,the linestotal:26 '/etc/yum.conf is max,the lines total:26[[email  protected] bin]# bash test24.shplz enter two path:[[email protected]  Bin]# bash test24.sh abcplz enter two path:[[email protected] bin]# bash test24.sh abc  cbaabc not a common file!

(5) Write a script

(1) Prompt the user to enter a string;

(2) Judgment:

If the input is quit, exit the script;

Otherwise, the string content of its input is displayed

#!/bin/bash#read-p "Plz input a string:"-t5 AIF [-Z $a];  Then echo "Plz enter string!" Exit 1fiif [[$a = = "quit"]]; Then Exit 1else echo "$a" fi

Test script:

[[email protected] bin]# bash test25.shplz input a string:abcabc[[email protected] bin]# bash test25.shplz input a string: Quit[[email protected] bin]#[[email protected] bin]# bash test25.shplz input a string:plz enter string!

write a script to print the 2^n table;n equals a user-entered value

Shell Script Job