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• bash: copying files without prompt:

  It can be annoying that the ‘cp’ command keep prompting if you are to overwrite some files. This is due the cp alias. To fix that, unalias cp cp -af source target done. Like it.? Share it:Tweet

• bash: testing conditions using if-grep:

  this expr can be really useful to determine if a term has been found or not using grep. short and sweet enough for me. if [ ! -z $(echo $var | grep “cond”) ]; then echo “found”; else echo ” not found”; fi Like it.? Share it:Tweet

• Bash: Simple command to mass replace content in directory:

  Imagine that we need to mass change the content in certain directory. A combination of find and sed can save the day. It is very to do it in perl as well. find /your/dir -type f | xargs sed -i ‘s/old/new/g’ Like it.? Share it:Tweet

• bash: passing output from one program to another:

  sometimes you want to be able to pass output from one program to another, say from bash to php. There is a neat trick to do it. In php, we execute the bash script restartapache. <?php $command=”/usr/local/bin/restartapache {$_GET[‘server’]}”; exec($command, $output); foreach ($output as $v) { echo “$v <br/>”; } ?> then in the bash, we … Continue reading

• bash expect: script to handle command line prompts:

  expect is very useful to automate login process. I thought it is helpful when doing testing as well. A simple login script might work like this: #!/usr/bin/env expect eval spawn “/path/program” expect “^Enter Auth Username:” send “user\n” expect “Enter Auth Password:” send “password\n” To install expect, “yum install expect” Like it.? Share it:Tweet