CODEWITHSUNDEEP
bashterminal
pbialy
pbialy

Reputation: 1083

Custom terminal's bash commands on ubuntu

I wanna make some custom commands for my terminal (i'm using Ubuntu).

I've already learned that i need to, for example, edit '.bash_aliases' file (in /home/your_user_name/), type 'source ~/.bash_aliases', and it should work then.

Well some things really works, like if i write (in '.bash_aliases') something like:

my_comm(){
            if [ "$1" = aaa ]; then
                    echo hi a
            fi

            if [ "$1" = bbb ]; then
                    echo hello b
            fi

            #echo this is a comment :]
            echo ending echo 
    }

then if i'll save file, type 'source ~/.bash_aliases', and run:

my_comm

it will print:

ending echo

and writing

my_comm bbb

will give:

hello b
ending echo

That's nice, but i want to know few more things, and i can't find them by google :(



------------------------------------------QUESTIONS----------------------------------------



(1) how can i set a variable and then get the variable?

like:

var myVar = "some_dir"
cd /home/user/'myVar'/some_sub_dir/

?

(2) i wanna make a function to shortcut a find/grep command that i use often:

find . -name "var_1" -print0 | xargs -0 grep -l "var_2"

I did something like:

    ff(){
            find . -name '"$1"' -print0 | xargs -0 grep "$3" '"$2"'
    }

so, now executing:

ff views.py url -l

should give me:

find . -name 'views.py' -print0 | xargs -0 grep -l 'url'

but instead i recive:

grep: find . -name "$1" -print0
: There is no such file or directory



help pls :)

Upvotes: 0

Views: 844

Answers (2)

Sagar Sakre
Sagar Sakre

Reputation: 2426

You can even using alias keyword for single instructions or use function keyword and combine couple of instructions in one. you can have a look at this

Upvotes: 0

Anton Kovalenko
Anton Kovalenko

Reputation: 21507

(1) how can i set a variable and then get the variable?

Like this:

myVar="/long/name/may have/a space/"
....
cd /home/user/"$myVar"/someSubDir.

Double quotes don't prevent variable substitution (unlike single quotes).

(2) i wanna make a function to shortcut a find/grep command that i use often:

find . -name '"$1"' -print0 | xargs -0 grep "$3" '"$2"'

You achieve nothing useful with multiple kind of quotes here; actually you prevent $1 and $2 from being substituted and that breaks your function. Try this:

find . -name "$1" -print0 | xargs -0 grep "$3" "$2"

Upvotes: 2

Related Questions