05-28-2009
I'm thinking about just changing all special characters by adding a "\" before them, and then undo that change when the processing is done. Is that optimal?
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Hi All,
I need to print the lines after 2nd line irrespective of the number of lines in file
if the file contents are like below
----------
root:!:0:0::/root:/usr/bin/ksh
daemon:!:1:1::/etc:
bin:!:2:2::/bin:
sys:!:3:3::/usr/sys:
adm:!:4:4::/var/adm:
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Hi everyone, I have a basic csh/awk question.
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3. Shell Programming and Scripting
Hi all,
I got several lines line this
a b c d e 1 e
a 1 c d e 3 f
a b c 1 e 8 h
a b c d e 1 w
a 1 c d e 2 w
a b c d e 1 t
a b c d e 7 4
How can I print the line if 1 is the field one before the last field?
Basicly this 2 field ?
a b c d e 1 e
a b c d e 1 t
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Similar question... I have a space delimited text file and I want to only print the lines where the 3rd word/field/column is equal to "01"
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I meant to say:
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plz help me!!
I have this file ,
3408 5600
3796 6035
4200 6285
4676 0
40 1554
200 1998
652 2451
864 2728
1200 0
I want it like if $2==0,replace it with field from the previous line+500
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3408 5600
3796 6035
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6. Shell Programming and Scripting
i want to print lines in a file that the 1st field of each line has a Date shape such:
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7. Shell Programming and Scripting
need a one liner to compare 2nd and 3rd field and print values that are not matched in 2nd field
Input
col 2 col 3
1.1.1.1 11.11.11.11
8.8.8.8 0.0.0.0
3.3.3.3 2.2.2.2
7.7.7.7 3.3.3.3
5.5.5.5 1.1.1.1
4.4.4.4
6.6.6.6
9.9.9.9
output
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Hi Guys,
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---
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Hello,
I have a text file in the below format:
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I am trying to use awk to print the unique entries in $2
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File.txt
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LEARN ABOUT MOJAVE
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)