unset .bashrc Post: 302505263

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to unset 'finger' info?

Hi, Command "chfn" can be used to change finger information.. can anybody tell me how to unset i mean reset the same finger information. Thanks in advance, Chanakya

2. UNIX for Advanced & Expert Users

how to unset the readonly variable

Hi All, May be this is a very simple question... $ b=8 $ readonly b $ echo $b 8 $ b=90 -bash: b: readonly variable $ unset b -bash: unset: b: cannot unset: readonly variable I m not able to change the readonly mode of variable b Please help me out.. Thanks Nidhi

3. Shell Programming and Scripting

Using unset to delete array elements

Hi, I am writing a BASH script. My questions regard deleting elements of arrays. I have an array: michael-browns-powerbook-g4-15:~ msb65$ test_array=(1 2 3 4) michael-browns-powerbook-g4-15:~ msb65$ echo ${test_array} 1 2 3 4 To delete the second element of test_array I type:...

4. Shell Programming and Scripting

How to unset all variables in shell?

can I use unset to unset all the variables in a shell sciprt? VAR1=1 VAR2=2 VAR3=3 unset whether this unset will afftect any system variables? Thanks,

5. Shell Programming and Scripting

[ask] about unset variables

I'm wondering, is the number of variables will affect execution time of my bash script or maybe affect the cpu workload, cpu memory, etc ? If I create so many variables, should I unset each one of that variables after I used them or after I think they are no longer needed? and if my script...

6. Shell Programming and Scripting

Unset variable with characters in value

I have a script with a $PASSWORD variable. I unset it right after using it, just to minimize the chance it could be left around for a snooper. That worked just fine... until I used a password with a value of "P@ssw0rd" Now, unset (even with -f, even with the variable enquoted) tells me: unset:...

7. Shell Programming and Scripting

Listing all local variables for unset

I have tried to thoroughly search other threads before posting this question... I have a shell script (bsh) that I'd like to "re-execute" if the user chooses to. Before the program is executed again the local variables (those set within the script) need to be unset. Is there a command that...

8. Red Hat

PROC_MEM_RES how to set/unset/change

Hi all, Does anyone know how to change PROC_MEM_RES? We have a DB server with quite a few oracle instances (RAC) and we are getting critical alerts for PROC_MEM_RES. Anyone know how to increase the current setting or what we should do about it? Thanks in advance. john

9. UNIX for Dummies Questions & Answers

Unset environement variable

Hi, I have the following line in the script unset _SET_ENV_AA unset _SETENV but where I can check the value for this environement variable

10. UNIX for Dummies Questions & Answers

Where unset command locates?

Hi, Can someone tell what is the path for "unset", I tried "which" command but getting below error # which unset /usr/bin/which: no unset in (/usr/lib/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin/:/root/bin)

LEARN ABOUT REDHAT

e2undo

E2UNDO(8)                                                     System Manager's Manual                                                    E2UNDO(8)

NAME

       e2undo - Replay an undo log for an ext2/ext3/ext4 filesystem

SYNOPSIS

       e2undo [ -f ] [ -h ] [ -n ] [ -o offset ] [ -v ] [ -z undo_file ] undo_log device

DESCRIPTION

       e2undo  will replay the undo log undo_log for an ext2/ext3/ext4 filesystem found on device.  This can be used to undo a failed operation by
       an e2fsprogs program.

OPTIONS

       -f     Normally, e2undo will check the filesystem superblock to make sure the undo log matches with the filesystem on the device.  If  they
              do not match, e2undo will refuse to apply the undo log as a safety mechanism.  The -f option disables this safety mechanism.

       -h     Display a usage message.

       -n     Dry-run; do not actually write blocks back to the filesystem.

       -o offset
              Specify the filesystem's offset (in bytes) from the beginning of the device or file.

       -v     Report which block we're currently replaying.

       -z undo_file
              Before  overwriting  a  file  system  block,  write  the old contents of the block to an undo file.  This undo file can be used with
              e2undo(8) to restore the old contents of the file system should something go wrong.  If the empty string is passed as the  undo_file
              argument,  the  undo file will be written to a file named e2undo-device.e2undo in the directory specified via the E2FSPROGS_UNDO_DIR
              environment variable.

              WARNING: The undo file cannot be used to recover from a power or system crash.

AUTHOR

       e2undo was written by Aneesh Kumar K.V. (aneesh.kumar@linux.vnet.ibm.com)

AVAILABILITY

       e2undo is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.

SEE ALSO

       mke2fs(8), tune2fs(8)

E2fsprogs version 1.44.1                                            March 2018                                                           E2UNDO(8)