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unix - Makefile ifeq logical AND
    I would like to check multiple conditions in an if loop of GNU make file. Here's an example: ifeq ($(TEST_FLAG), ... s 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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685 views
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unix - gnuplot plot data from two files: in one x coordinate, in other y
    I have two files: one with x coordinates, and other with y. Is there a way to plot this two files in one ... row by row this two files? Thanks See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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604 views
1 answer
unix - Setting environment variable in shell script does not make it visible to the shell
    I want to use a shell script that I can call to set some environment variables. However, after the execution of the ... me what I'm doing wrong? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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523 views
1 answer
unix - How to get parameters from config file in R script
    Is there a way to read parameters from a file in an R script? I want to create a config file that has ... R Scripts, Perl Scripts & Java? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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703 views
1 answer
unix - unlink vs remove in c++
    What is the difference between remove and unlink functions in C++? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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721 views
1 answer
unix - Ruby: get local IP (nix)
    I need to get my IP (that is DHCP). I use this in my environment.rb: LOCAL_IP = `ifconfig wlan0`. ... there rubyway or more clean solution? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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652 views
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unix - FTP Delete non empty directory
    I am connected to a Unix server and I am trying to, via FTP, delete the directory dir with several files ... getting prompted for every file? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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656 views
1 answer
unix - What is the difference between Ctrl-C and SIGINT?
    I have been debugging a Python program which segfaults after receiving a KeyboardInterrupt exception. This is normally ... break fi wait done See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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891 views
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unix - How can I spoof the sender IP address using curl?
    I need to make a request with a spoofed IP address for testing purposes. What's the easiest way to do this? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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615 views
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unix - Delete the first five characters on any line of a text file in Linux with sed
    I need a one-liner to remove the first five characters on any line of a text file. How can I do that with sed? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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585 views
1 answer
unix - Difference between data section and the bss section in C
    When checking the disassembly of the object file through the readelf, I see the data and the bss segments ... bss section and rodata section? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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686 views
1 answer
unix - How can I run a cron job every 5 minutes starting from a time other than 0 minutes?
    I would like to have a script run every 5 minutes let's say starting from 13:02 so I can have another script ... job. How can I achieve this? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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721 views
1 answer
unix - "which in ruby": Checking if program exists in $PATH from ruby
    my scripts rely heavily on external programs and scripts. I need to be sure that a program I need to call exists ... " method to the File class. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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624 views
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unix - Single line sftp from terminal
    Several times throughout the day, I may be running a test where I need to look through a log file on a remote server ... Mac OS X 10.8. Thanks. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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822 views
1 answer
unix - Sort CSV file by column priority using the "sort" command
    I have a csv file, and I would like to sort it by column priority, like "order by". For example: 3;1;2 ... result using "sort" command on Unix. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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765 views
1 answer
unix - Curl to grab remote filename after following location
    When downloading a file using curl, how would I follow a link location and use that for the output ... redirected file via command line? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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652 views
1 answer
unix - Compare two folders which have many files inside contents
    Have two folders with approx. 150 java property files. In a shell script, how to compare both folders to see ... should be in a report format. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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581 views
1 answer
unix - How do I get the find command to print out the file size with the file name?
    If I issue the find command as follows: $ find . -name *.ear It prints out: ./dir1/dir2/earFile1.ear ./ ... KB ./dir1/dir3/earFile1.ear 5400 KB See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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555 views
1 answer
unix - find without recursion
    Is it possible to use the find command in some way that it will not recurse into the sub-directories? For ... will be only File1, File2? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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703 views
1 answer
unix - Command line: piping find results to rm
    I'm trying to work out a command which deletes sql files older than 15 days. The find part is working but not ... .sql What am I doing wrong? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
532 views
1 answer
unix - Shell script "for" loop syntax
    I have gotten the following to work: for i in {2..10} do echo "output: $i" done It produces a bunch of ... array, and not part of a string? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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661 views
1 answer
unix - How to colorize diff on the command line
    When I have a diff, how can I colorize it so that it looks good? I want it for the command line, so please no GUI solutions. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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889 views
1 answer
unix - Calling multiple commands using os.system in Python
    I would like to invoke multiple commands from my python script. I tried using the os.system(), however, I'm ... call to launch doesn't work. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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618 views
1 answer
unix - How to create a temporary directory in C?
    I am trying to create a temporary directory to perform some operations in it and then delete the whole thing ... of files and directories. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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724 views
1 answer
unix - How to get magic number of a binary file
    There is a magic number associated with each binary file , does anyone know how to retrieve this information from the file? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
597 views
1 answer
unix - how do I get the process list in Python?
    How do I get a process list of all running processes from Python, on Unix, containing then name of the ... can filter and kill processes. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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479 views
1 answer
unix - Reading a large file using C (greater than 4GB) using read function, causing problems
    I have to write C code for reading large files. The code is below: int read_from_file_open(char *filename,long ... normal mode, not using DD64. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
573 views
1 answer
unix - Exit status of ping command
    My Perl script gets stuck with an exit status when trying to use the ping command. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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