Bash shell - Check if value is valid directory. Post: 302573481

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1. Shell Programming and Scripting

How to check for a valid numeric input

Hi Folks, I'm using bash script. I would like to check whether input is a number or not.(Only positive numbers).. if space or non numeric is entered, it should say "invalid input". pls help.. thanks in adv. Br/// Vijay.

2. Shell Programming and Scripting

to check whether a directory or filename path is valid or not

the script on excution should take a directory path from useran a numric input and it should check indicate whether its write or not? if the cmmd sh<script-name>,dir/path.<500>" is greater than 500 in size should be copied to dir ,temp in pwd and display the mesage'files of 2000 bytes hav been...

3. Shell Programming and Scripting

how to check for valid password

I need to check if an account has a valid password. Would something like this work? read ACCNAME if grep -q "^$ACCNAME:\$6:" /etc/shadow; thenI noticed every entry in my shadow file that has a password starts with $6 ... it works for my current setup, but would it always work? I can't test...

4. UNIX for Dummies Questions & Answers

How to check if file contains valid strings?

Hi All, I am a newbie...I would like to have a function which ll check if a file contains valid strings before "=" operator. Just to give you my requirement: assume my file has content: hello= gsdgsd sfdsg sgdsg sgdgdg world= gggg hhhh iiiii xxxx= pppp ppppp pppp my...

5. Shell Programming and Scripting

How to check the user input to be valid using shell script?

How to check the user input to be valid using shell script? The valid input is in the format like as follows. 1. It can only have r,w,x or a hyphen and nothing else. 2. ensure the r, w, x are in the correct order. for example: rwxr-xr-x is a valid format. Thanks

6. Shell Programming and Scripting

Need a script to check if an argument is valid shell variable

I need a script that should print 'yes' if the argument is a valid shell variable name else 'No' if it is not a valid shell variable. A valid one begins with an alphabet or percentage (%) character and is followed by zero or more alphanumberic or percentage (%) characters. For example: $...

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Check if a string is a valid timestamp in UNIX.

Hi all, I have date and time value in a string, I want to check if it is a valid date and time. Need help on this. Thanks

8. Shell Programming and Scripting

Check if time format is valid

How can I validate if time (HH:MM:SS) argument is valid? I got this from web but I can't modify it to exit the script if the time argument is invalid. echo $1 | awk -F ':' '{ print ($1 <= 23 && $2 <= 59 && $3 <= 59) ? "good" : "bad" }' ex: ./script.ksh 12:34:21 = okay ./script.ksh...

9. Shell Programming and Scripting

Check for valid hostnames

Hello, I am trying to develop a script to check for valid hostnames. Below are the prerequisites for a valid hostname which I got from wiki : Hostnames are composed of series of labels concatenated with dots, as are all domain names. For example, "en.wikipedia.org" is a hostname. Each label...

10. Shell Programming and Scripting

Bash to check directory and create missing folder from file

In the below bash I am trying to ensure that all folders (represented by $folders) in a given directory are created. In the file f1 the trimmed folder will be there somewhere (will be multiple trimmed folders). When that trimmed folder is found (represented by $S5) the the contents of $2 printed...

LEARN ABOUT PHP

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to check for a valid numeric input

Discussion started by: Vijayakumarpc

2. Shell Programming and Scripting

to check whether a directory or filename path is valid or not

Discussion started by: arukr

3. Shell Programming and Scripting

how to check for valid password

Discussion started by: ADay2Long

4. UNIX for Dummies Questions & Answers

How to check if file contains valid strings?

Discussion started by: rtagarra