tagged [shell]
Going to a specific line number using Less in Unix
Going to a specific line number using Less in Unix I have a file that has around million lines. I need to go to line number 320123 to check the data. How do I do that?
How do I create a Bash alias?
How do I create a Bash alias? I'm on OSX and I need to put something like this, `alias blah="/usr/bin/blah"` in a config file but I don't know where the config file is.
How to append one file to another in Linux from the shell?
How to append one file to another in Linux from the shell? I have two files: `file1` and `file2`. How do I append the contents of `file2` to `file1` so that contents of `file1` persist the process?
Sending a mail from a linux shell script
Sending a mail from a linux shell script I want to send an email from a Linux Shell script. What is the standard command to do this and do I need to set up any special server names?
UNIX export command
UNIX export command I am trying to understand the use of `export` command. I tried using `man export`, but there is no manual for this command. Can anyone please help me out understanding the use of `...
Shell script to delete directories older than n days
Shell script to delete directories older than n days I have directories named as: How would I delete the directories that are older than 10 days with a bash shell script?
How can I add a help method to a shell script?
How can I add a help method to a shell script? How do I check if a `-h` attribute has been passed into a shell script? I would like to display a help message when a user calls `myscript.sh -h`.
Shell script variable not empty (-z option)
Shell script variable not empty (-z option) How to make sure a variable is empty with the `-z` option ? It returns the error :
- Modified
- 19 Sep at 12:26
rsync copy over only certain types of files using include option
rsync copy over only certain types of files using include option I use the following bash script to copy only files of certain extension(in this case *.sh), however it still copies over all the files....
Define an alias in fish shell
Define an alias in fish shell I would like to define some aliases in fish. Apparently it should be possible to define them in but they don't get auto loaded when I restart the shell. Any ideas?
Pretty print in MongoDB shell as default
Pretty print in MongoDB shell as default Is there a way to tell Mongo to pretty print output? Currently, everything is output to a single line and it's difficult to read, especially with nested arrays...
- Modified
- 28 Oct at 16:33
How to specify a multi-line shell variable?
How to specify a multi-line shell variable? I have written a query: local sql - a very long string. Query is not formatted. How can I split a string into multiple lines?
Case insensitive comparison of strings in shell script
Case insensitive comparison of strings in shell script The `==` operator is used to compare two strings in shell script. However, I want to compare two strings ignoring case, how can it be done? Is th...
- Modified
- 17 Jun at 13:40
How to find the length of an array in shell?
How to find the length of an array in shell? How do I find the length of an array in shell? For example: And I want to get its length, which is 5 in this case.
Rearrange columns using cut
Rearrange columns using cut I am having a file in the following format I want the columns to be rearranged. I tried below command > cut -f2,1 file.txt The command doesn't reorder the columns. Any idea...
What is the $? (dollar question mark) variable in shell scripting?
What is the $? (dollar question mark) variable in shell scripting? I'm trying to learn shell scripting, and I need to understand someone else's code. What is the `$?` variable hold? I can't Google sea...
How to add lines to end of file on Linux
How to add lines to end of file on Linux I want to add the following 2 lines: to the end of the file `vncservers` found at the directory `/etc/sysconfig/`. How can I do this?
How to sort a file in-place?
How to sort a file in-place? When we use the `sort file` command, the file shows its contents in a sorted way. What if I don't want to get any output on stdout, but in the input file instead?
unzip password protected zip in unix
unzip password protected zip in unix I need to create a shell script wherein I will unzip a password protected zip file. I know the password, and need to automate the unzip process. How can I achieve ...
Quick-and-dirty way to ensure only one instance of a shell script is running at a time
Quick-and-dirty way to ensure only one instance of a shell script is running at a time What's a quick-and-dirty way to make sure that only one instance of a shell script is running at a given time?
Unix shell script find out which directory the script file resides?
Unix shell script find out which directory the script file resides? Basically I need to run the script with paths related to the shell script file location, how can I change the current directory to t...
How to use find command to find all files with extensions from list?
How to use find command to find all files with extensions from list? I need to find all image files from directory (gif, png, jpg, jpeg). How to modify this string to find not only .jpg files?
Is there an interactive interpreter for C#?
Is there an interactive interpreter for C#? Sometimes it's handy to have access to your language to do quick things without starting Visual Studio and creating a new console app. Is there something li...
Get just the filename from a path in a Bash script
Get just the filename from a path in a Bash script How would I get just the filename without the extension and no path? The following gives me no extension, but I still have the path attached:
How can I execute a command stored in a variable?
How can I execute a command stored in a variable? What is the correct way to call some command stored in variable? Are there any differences between 1 and 2?
- Modified
- 3 Dec at 03:21