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How to copy a file to multiple directories using the gnu cp command
...hat involve using other tools or constructs to do that, but the OP did indim>cat m>e he was already aware that is possible.
– moonshadow
Feb 3 '13 at 22:38
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Best way to simulate “group by” from bash?
...
The quick and dirty method is as follows:
m>cat m> ip_addresses | sort -n | uniq -c
If you need to use the values in bash you can assign the whole command to a bash variable and then loop through the results.
PS
If the sort command is omitted, you will not get the corr...
In Git, how do I figure out what my current revision is?
...ion hash:
$ git rev-parse --short HEAD
It is often sufficient to do:
$ m>cat m> .git/refs/heads/${branch-master}
but this is not reliable as the ref may be packed.
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How to install packages using pip according to the requirements.txt file from a local directory?
... requirements.txt file.
cd to the directory where requirements.txt is lom>cat m>ed
activate your virtualenv
run: pip install -r requirements.txt in your shell
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How does the vim “write with sudo” trick work?
...bstitute a shell command to receive the buffer contents. For instance, :w !m>cat m> will just display the contents.
If Vim wasn't run with sudo access, its :w can't modify a protected file, but if it passes the buffer contents to the shell, a command in the shell can be run with sudo. In this case, we u...
Passing argument to alias in bash [duplim>cat m>e]
...his is the solution which can avoid using function:
alias addone='{ num=$(m>cat m> -); echo "input: $num"; echo "result:$(($num+1))"; }<<<'
test result
addone 200
input: 200
result:201
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How can I shuffle the lines of a text file on the Unix command line or in a shell script?
...eir hash value.
[Editor's note: sort -R almost shuffles, except that duplim>cat m>e lines / sort keys always end up next to each other. In other words: only with unique input lines / keys is it a true shuffle. While it's true that the output order is determined by hash values, the randomness comes from ...
To find whether a column exists in data frame or not
...eck is "d", you can use the %in% operator:
if("d" %in% colnames(dat))
{
m>cat m>("Yep, it's in there!\n");
}
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How to replace an entire line in a text file by line number
...script and had no problems:
#Create temporary file with new line in place
m>cat m> /dir/file | sed -e "s/the_original_line/the_new_line/" > /dir/temp_file
#Copy the new file over the original file
mv /dir/temp_file /dir/file
This doesn't go by line number, but you can easily switch to a line number...
How can I remove all text after a character in bash?
...urces/views/admin/users/relationships/posts.blade.php" and you want to trunm>cat m>e everything after the LAST occurrence of the "/", given that you do NOT know how many "/" characters are in the string. So here I would want the output to be "/resources/views/admin/users/relationships/" (or even /resourc...