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Bash if statement

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packetBunny answered on February 21, 2020 Popularity 10/10 Helpfulness 1/10

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Bash if statement

Comment

if first-test-commands; then
  consequent-commands;
[elif more-test-commands; then
  more-consequents;]
[else alternate-consequents;]
fi

Popularity 10/10 Helpfulness 1/10 Language shell

Source: www.shell-tips.com

Tags: bash if-statement shell

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Contributed on Apr 20 2022

packetBunny

0 Answers Avg Quality 2/10

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bash if statement

Comment

and - &&
or - ||

# and example
if [ -r $1 ] && [ -s $1 ]
then
echo This file is useful.
fi

# or example
if [ $USER == 'bob' ] || [ $USER == 'andy' ]
then
ls -alh
else
ls
fi

Popularity 10/10 Helpfulness 5/10 Language shell

Source: Grepper

Tags: bash

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Contributed on Feb 21 2020

fsociety

0 Answers Avg Quality 2/10

bash if

Comment

#!/bin/bash

foo="qux"
bar="qux"

if [ "$foo" = "$bar" ]; then
    echo "The strings are equal."
else
    echo "The strings aren't equal."
fi

Popularity 10/10 Helpfulness 4/10 Language shell

Source: Grepper

Tags: bash

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Contributed on Sep 14 2020

garzj

0 Answers Avg Quality 2/10

bash negate if

Comment

if [[ $? -ne 0 ]]; then       # -ne: not equal

if ! [[ $? -eq 0 ]]; then     # -eq: equal

if [[ ! $? -eq 0 ]]; then

Popularity 9/10 Helpfulness 4/10 Language shell

Source: stackoverflow.com

Tags: bash

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Contributed on Dec 06 2020

Tame Tamarin

0 Answers Avg Quality 2/10

if statement in shell script

Comment

  if [ "$result" == "1" ]
    then 
      echo "test" >> /home/samurai/test.txt
    fi
    

    
    if [[ "$result" -eq "1" ]]
    then 
      echo "test" >> /home/samurai/test.txt
    fi

Popularity 10/10 Helpfulness 4/10 Language shell

Source: Grepper

Tags: if-statement if-stateme

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Contributed on Aug 12 2021

Cooperative Chamois

0 Answers Avg Quality 2/10

bash else if

Comment

if [ "$animal" == "penguin" ]; then
  echo "Hmmmmmm fish... Tux happy!"
elif [ "$animal" == "dolphin" ]; then
  echo "Pweetpeettreetppeterdepweet!"
else
  echo "*prrrrrrrt*"
fi

if TEST-COMMANDS; then
  CONSEQUENT-COMMANDS;
elif MORE-TEST-COMMANDS; then
  MORE-CONSEQUENT-COMMANDS;
else
  ALTERNATE-CONSEQUENT-COMMANDS;
fi

Popularity 10/10 Helpfulness 4/10 Language shell

Source: tldp.org

Tags: bash

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Contributed on Nov 12 2020

Sven

0 Answers Avg Quality 2/10

bash if else

Comment

# Basic syntax
if [[ condition_1 ]]; then
	echo "Code to execute if condition_1 is true"
elif [[ condition_2 ]]; then
	echo "Code to execute if condition_1 is false and condition_2 is true"
else
	echo "Code to execute if condition_1 and condition_2 are false"
fi

# Note, the syntax for the one-line equivalent is:
if [[ condition_1 ]]; then echo "Code to execute if condition_1 is true"; elif [[ condition_2 ]]; then echo "Code to execute if condition_1 is false and condition_2 is true"; else echo "Code to execute if condition_1 and condition_2 are false"; fi


# Note to self, see this link for more on bash operators and [ ] vs [[ ]]:
# 	https://tldp.org/LDP/abs/html/comparison-ops.html

Popularity 10/10 Helpfulness 4/10 Language shell

Source: linuxhint.com

Tags: bash

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Contributed on Mar 04 2022

Charles-Alexandre Roy

0 Answers Avg Quality 2/10

bash if statement

Comment

Operator			Description
! EXPRESSION			The EXPRESSION is false.
-n STRING			The length of STRING is greater than zero.
-z STRING			The lengh of STRING is zero (ie it is empty).
STRING1 = STRING2		STRING1 is equal to STRING2
STRING1 != STRING2		STRING1 is not equal to STRING2
INTEGER1 -eq INTEGER2		INTEGER1 is numerically equal to INTEGER2
INTEGER1 -gt INTEGER2		INTEGER1 is numerically greater than INTEGER2
INTEGER1 -lt INTEGER2		INTEGER1 is numerically less than INTEGER2
-d FILE				FILE exists and is a directory.
-e FILE				FILE exists.
-r FILE				FILE exists and the read permission is granted.
-s FILE				FILE exists and it's size is greater than zero (ie. it is not empty).
-w FILE				FILE exists and the write permission is granted.
-x FILE				FILE exists and the execute permission is granted.

Popularity 10/10 Helpfulness 4/10 Language shell

Source: Grepper

Tags: bash

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Contributed on Feb 21 2020

fsociety

0 Answers Avg Quality 2/10

if and if bash

Comment

if [ "${STATUS}" != 200 ] && [ "${STRING}" != "${VALUE}" ]; then

Popularity 10/10 Helpfulness 4/10 Language shell

Source: stackoverflow.com

Tags: bash

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Contributed on May 23 2020

wantyapps

0 Answers Avg Quality 2/10

bash if

Comment

nome=tiago
## with SPACE between variable and comparation
if [ $nome == 'tiago' ] ;
then
    echo "hello Tiago"
fi

Popularity 10/10 Helpfulness 4/10 Language shell

Source: Grepper

Tags: bash

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Contributed on Oct 21 2021

Tiago F2

0 Answers Avg Quality 2/10

if else bash shell script

Comment

if [[ some condition ]]; then
  do_this
elif [[ another condition ]]; then
  do_that_a
elif [[ yet another condition]]; then
  do_that_b
else
  do_that_default_thing
fi

Popularity 10/10 Helpfulness 4/10 Language shell

Source: www.compciv.org

Tags: bash

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Contributed on Jun 24 2021

Smoggy Scarab

0 Answers Avg Quality 2/10

Bash if statement

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