Full Discussion: Split values using awk
Top Forums UNIX for Beginners Questions & Answers Split values using awk Post 303046313 by MadeInGermany on Thursday 30th of April 2020 01:11:10 PM
Old 04-30-2020
A shell script with only shell builtins:
set -f # unquoted $f2
while IFS="," read f1 f2
  printf "$f1, %s\n" $f2
done < file

This User Gave Thanks to MadeInGermany For This Post:

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Split a file with no pattern -- Split, Csplit, Awk

I have gone through all the threads in the forum and tested out different things. I am trying to split a 3GB file into multiple files. Some files are even larger than this. For example: split -l 3000000 filename.txt This is very slow and it splits the file with 3 million records in each... (10 Replies)
Discussion started by: madhunk
10 Replies

2. Shell Programming and Scripting

split variable values into array

i have these values inside variable $blah BUNGA TERATAI 3 5055 ITH 1 0 0 0 1 1 JADE TRADER 143W ITH 4 0 0 0 4 4 MOL SPLENDOR 0307A ITH 3 0 0 0 3 3 so how do I split them into array with the... (4 Replies)
Discussion started by: finalight
4 Replies

3. Shell Programming and Scripting

How to pick values from column based on key values by usin AWK

Dear Guyz:) I have 2 different input files like this. I would like to pick the values or letters from the inputfile2 based on inputfile1 keys (A,F,N,X,Z). I have done similar task by using awk but in that case the inputfiles are similar like in inputfile2 (all keys in 1st column and values in... (16 Replies)
Discussion started by: repinementer
16 Replies

4. Shell Programming and Scripting

AWK: read values from file1; search for values in file2

I have read another post about this issue and am wondering how to adapt it to my own, much simpler, issue. I have a file of user IDs like so: 333333 321321 546465 ...etc I need to take each number and use it to print records wherein the 5th field matches the user ID pulled from the... (2 Replies)
Discussion started by: Bubnoff
2 Replies

5. Shell Programming and Scripting

Split the values

ABC|DFE HYK|YUI is the contents in file. I am using the for loop for for value_list in `cat ./file` ; do echo $value_list cat use_firstvalue > second_value done I have to split the based on '|' and it should be used as a varaible in the cat command. How to do that. Please help me... (3 Replies)
Discussion started by: sandy1028
3 Replies

6. Shell Programming and Scripting

awk to split one field and print the last two fields within the split part.

Hello; I have a file consists of 4 columns separated by tab. The problem is the third fields. Some of the them are very long but can be split by the vertical bar "|". Also some of them do not contain the string "UniProt", but I could ignore it at this moment, and sort the file afterwards. Here is... (5 Replies)
Discussion started by: yifangt
5 Replies

7. Shell Programming and Scripting

Shell Script:split the values

Hi, I have file like below as file.txt Linux sptpp1a 2.6.18 348.1.1.el5 xxxxx 05/02/2013 %usr %sys %wio %idle 14:18:30 0 1 0 99 14:18:40 1 1 0 98 14:18:50 1 1 0 98 14:19:00 ... (5 Replies)
Discussion started by: Mani_apr08
5 Replies

8. Shell Programming and Scripting

Split file according to column values

Hi all, I am trying to split a file by the values of the FIRST column. The following awk works to split the file by the value of the LAST column -- How can I alter this to divide the column by the FIRST column?? awk -F"\t" '{ print > $NF ; close($NF)}' filename1Thanks! (5 Replies)
Discussion started by: owwow14
5 Replies

9. Shell Programming and Scripting

awk file to read values from Db2 table replacing hard coded values

Hi, I want to replace a chain of if-else statement in an old AWK file with values from Db2 table or CSV file. The part of code is below... if (start_new_rec=="true"){ exclude_user="false"; user=toupper($6); match(user, "XXXXX."); if (RSTART ==2 ) { ... (9 Replies)
Discussion started by: asandy1234
9 Replies

10. Shell Programming and Scripting

Split a content in a file with specific interval base on the delimited values using UNIX command

Hi All, we have a requirement to split a content in a text file every 5 rows and write in a new file . conditions: if 5th line falls between center of the statement . it should look upto after ";" files are below format: 1 UPDATE TABLE TEST1 SET VALUE ='AFDASDFAS' 2 WHERE... (3 Replies)
Discussion started by: KK230689
3 Replies
SU(1)								   User Commands							     SU(1)

su - change user ID or become superuser SYNOPSIS
su [options] [username] DESCRIPTION
The su command is used to become another user during a login session. Invoked without a username, su defaults to becoming the superuser. The optional argument - may be used to provide an environment similar to what the user would expect had the user logged in directly. Additional arguments may be provided after the username, in which case they are supplied to the user's login shell. In particular, an argument of -c will cause the next argument to be treated as a command by most command interpreters. The command will be executed by the shell specified in /etc/passwd for the target user. You can use the -- argument to separate su options from the arguments supplied to the shell. The user will be prompted for a password, if appropriate. Invalid passwords will produce an error message. All attempts, both valid and invalid, are logged to detect abuse of the system. The current environment is passed to the new shell. The value of $PATH is reset to /bin:/usr/bin for normal users, or /sbin:/bin:/usr/sbin:/usr/bin for the superuser. This may be changed with the ENV_PATH and ENV_SUPATH definitions in /etc/login.defs. A subsystem login is indicated by the presence of a "*" as the first character of the login shell. The given home directory will be used as the root of a new file system which the user is actually logged into. OPTIONS
The options which apply to the su command are: -c, --command COMMAND Specify a command that will be invoked by the shell using its -c. The executed command will have no controlling terminal. This option cannot be used to execute interactive programs which need a controlling TTY. -, -l, --login Provide an environment similar to what the user would expect had the user logged in directly. When - is used, it must be specified before any username. For portability it is recommended to use it as last option, before any username. The other forms (-l and --login) do not have this restriction. -s, --shell SHELL The shell that will be invoked. The invoked shell is chosen from (highest priority first): The shell specified with --shell. If --preserve-environment is used, the shell specified by the $SHELL environment variable. The shell indicated in the /etc/passwd entry for the target user. /bin/sh if a shell could not be found by any above method. If the target user has a restricted shell (i.e. the shell field of this user's entry in /etc/passwd is not listed in /etc/shells), then the --shell option or the $SHELL environment variable won't be taken into account, unless su is called by root. -m, -p, --preserve-environment Preserve the current environment, except for: $PATH reset according to the /etc/login.defs options ENV_PATH or ENV_SUPATH (see below); $IFS reset to "<space><tab><newline>", if it was set. If the target user has a restricted shell, this option has no effect (unless su is called by root). Note that the default behavior for the environment is the following: The $HOME, $SHELL, $USER, $LOGNAME, $PATH, and $IFS environment variables are reset. If --login is not used, the environment is copied, except for the variables above. If --login is used, the $TERM, $COLORTERM, $DISPLAY, and $XAUTHORITY environment variables are copied if they were set. Other environments might be set by PAM modules. CAVEATS
This version of su has many compilation options, only some of which may be in use at any particular site. CONFIGURATION
The following configuration variables in /etc/login.defs change the behavior of this tool: CONSOLE_GROUPS (string) List of groups to add to the user's supplementary groups set when logging in on the console (as determined by the CONSOLE setting). Default is none. Use with caution - it is possible for users to gain permanent access to these groups, even when not logged in on the console. DEFAULT_HOME (boolean) Indicate if login is allowed if we can't cd to the home directory. Default is no. If set to yes, the user will login in the root (/) directory if it is not possible to cd to her home directory. ENV_PATH (string) If set, it will be used to define the PATH environment variable when a regular user login. The value is a colon separated list of paths (for example /bin:/usr/bin) and can be preceded by PATH=. The default value is PATH=/bin:/usr/bin. ENV_SUPATH (string) If set, it will be used to define the PATH environment variable when the superuser login. The value is a colon separated list of paths (for example /sbin:/bin:/usr/sbin:/usr/bin) and can be preceded by PATH=. The default value is PATH=/sbin:/bin:/usr/sbin:/usr/bin. SULOG_FILE (string) If defined, all su activity is logged to this file. SU_NAME (string) If defined, the command name to display when running "su -". For example, if this is defined as "su" then a "ps" will display the command is "-su". If not defined, then "ps" would display the name of the shell actually being run, e.g. something like "-sh". SYSLOG_SU_ENAB (boolean) Enable "syslog" logging of su activity - in addition to sulog file logging. FILES
/etc/passwd User account information. /etc/shadow Secure user account information. /etc/login.defs Shadow password suite configuration. EXIT VALUES
On success, su returns the exit value of the command it executed. If this command was terminated by a signal, su returns the number of this signal plus 128. If su has to kill the command (because it was asked to terminate, and the command did not terminate in time), su returns 255. Some exit values from su are independent from the executed command: 0 success (--help only) 1 System or authentication failure 126 The requested command was not found 127 The requested command could not be executed SEE ALSO
login(1), login.defs(5), sg(1), sh(1). shadow-utils 4.5 01/25/2018 SU(1)

Featured Tech Videos

All times are GMT -4. The time now is 02:13 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy