Tag Archives: linux

Linux Check File Exist or not – Shell Script

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The following script used to check the specified file present or not in shell script

#!/bin/bash
#########################################################################################
# This Shell script used to find the specificedfile exixts or not on particular location #########################################################################################

filePath="/home/file-path"
fileName="$filePath/filename.txt"
if [ -f "$fileName" ]
then
echo "$fileName found"
else
echo "$fileName not found"
fi

To check multiple file on same if condtion

filePath="/home/file-path"
fileName="$filePath/filename.txt"
fileName2="$filePath/filename2.txt"
if [ -f "$fileName" ] && [ -f "$fileName2" ]
then
echo "$fileName found"
else
echo "$fileName not found"
fi

vi Editor – Searching and Replacing

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Searching and Replacing

The formal syntax for searching is:

:s/string

For example, suppose you want to search some text for the string “cherry.” Type the following and press ENTER:

:s/cherry

The first match for “cherry” in your text will then be highlighted. To see if there are additional occurrences of the same string in the text, type n, and the highlight will switch to the next match, if one exists.

The syntax for replacing one string with another string in the current line is

:s/pattern/replace/

Here “pattern” represents the old string and “replace” represents the new string. For example, to replace each occurrence of the word “lemon” in a line with “orange,” type:

:s/lemon/orange/

The syntax for replacing every occurrence of a string in the entire text is similar. The only difference is the addition of a “%” in front of the “s”:

:%s/pattern/replace/

Thus repeating the previous example for the entire text instead of just for a single line would be:

:%s/lemon/orange/

Src From : http://www.linfo.org/vi/search.html