Recent questions tagged Unix

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unix - What is the use/meaning of "#!/bin/sh" in shell scripting?

What is the use/meaning of "#!/bin/sh" in shell scripting? Please let me know whether it is considered in the script or not as it is commented. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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unix - What is the use/meaning of "#!/bin/sh" in shell scripting?

What is the use/meaning of "#!/bin/sh" in shell scripting? Please let me know whether it is considered in the script or not as it is commented. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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unix - How to create a custom magic file database

The unix file command uses a "magic" file database to determine which type of data a file contains, independently ... find how to create one. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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549 views

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unix - Shell, run four processes parallel

Currently I'm stuck at running time consuming simulations efficiently. The intention is to run 4 simulations in ... running at any time? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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555 views

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unix - What shell am I in?

Is there a command to identify the name/type of current shell, the path to the shell binary, and the version ... the deal with the dash there? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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521 views

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unix - Handling command line flags in C/C++

I am looking for a very simple explanation/tutorial on what flags are. I understand that flags work indicate a ... not, please let me know. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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682 views

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unix - What are the functional differences between iODBC and unixODBC?

There are two major Open Source platform independent implementation of the ODBC. It is iODBC and unixODBC. ... these two implementations? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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617 views

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unix - How to sort characters in a string?

I would like to sort the characters in a string. E.g. echo cba | sort-command abc Is there a command that ... over the string and sort it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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506 views

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unix - How to use group file permissions correctly on a git repository?

We're accessing a shared git repository via file paths, for various reasons I'll omit for now, created with - ... though. So... any suggestions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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628 views

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unix - Which systems define EAGAIN and EWOULDBLOCK as different values?

Just curious. Which systems providing both EAGAIN and EWOULDBLOCK #define them as different values? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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623 views

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unix - How can I set the last modified time of a file from python?

I have a python script that downloads a file over FTP using ftplib. My current download code looks just like the ... based OS if that matters. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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823 views

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unix - gpg decryption fails with no secret key error

I have a gpg .key file that is used as passphrase for decrypting a .dat.pgp file. The encrypted .data.pgp ... . How can we configure secret key See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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578 views

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unix - What does it mean to write to stdout in C?

Does a program that writes to "stdout" write to a file? the screen? I don't understand what it means to write to stdout. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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636 views

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unix - How do I use (n)curses in Ruby?

I'd like to create a progress bar to indicate the status of an a batch job in Ruby. I've read ... -forward, perfectly solved my problem. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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574 views

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unix - Remove line of text from multiple files in Linux

Is there a simple way to remove the same line of text from a folder full of text documents at the command line? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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521 views

1 answer

unix - Make Arrow and delete keys work in KornShell command line

I am new to Unix and am using sun solaris (v10 I think). I have my shell set as KornShell (ksh). ... to cycle through the command line history? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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583 views

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unix - What process is listening on a certain port on Solaris?

So I log into a Solaris box, try to start Apache, and find that there is already a process listening on ... efficient code that the clip above. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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865 views

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unix - How to truncate long matching lines returned by grep or ack

I want to run ack or grep on HTML files that often have very long lines. I don't want to see very ... this using any combination of Unix tools? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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601 views

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unix - AWK to print field $2 first, then field $1

Here is the input(sample): [email protected]|com.emailclient.account [email protected]|com.socialsite.auth.account I'm ... /suggestions? Thank you. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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554 views

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unix - Create text file and fill it using bash

I need to create a text file (unless it already exists) and write a new line to the file all using bash. ... could anyone explain this to me? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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580 views

1 answer

unix - How to remove leading whitespace from each line in a file

I have a file that looks something like this: for (i = 0; i < 100; i++) for (i = 0; i < 100; i++) ... ) How can this be done (using sed maybe?)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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557 views

1 answer

unix - Unable to diff files in two separate branches in Git

I have FileA in branchA and FileB in branchB. The problem is that I can access only one file at time. I ... diff tool to use opendiff in Mac See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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678 views

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unix - How to set bash aliases for docker containers in Dockerfile?

I am new to docker. I found that we can set environment variables using ENV instruction in the Dockerfile. ... for long commands in Dockerfile? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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634 views

1 answer

unix - Insert the carriage return character in vim

I'm editing a network protocol frame stored a file in Unix ( newlines). I need to insert the carriage return ... the right way to do it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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660 views

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unix - How do you use an identity file with rsync?

How do you use an identity file with rsync? This is the syntax I think I should be using with rsync to ... identity file on my local machine? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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621 views

1 answer

unix - How to set font color for STDOUT and STDERR

I want to differentiate the STDOUT and STDERR messages in my terminal. If a script or command is printing a ... bash: aliass: command not found See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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511 views

1 answer

unix - Can you change what a symlink points to after it is created?

Does any operating system provide a mechanism (system call - not command line program) to change the pathname referenced ... - in an answer. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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611 views

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unix - Shell Script — Get all files modified after <date>

I'd rather not do this in PHP so I'm hoping a someone decent at shell scripting can help. I need a ... file(s) keeping the path information. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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