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column(1) [centos man page]

COLUMN(1)							   User Commands							 COLUMN(1)

column - columnate lists SYNOPSIS
column [options] file... DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file or, by default, from standard input. Empty lines are ignored. OPTIONS
-c, --columns width Output is formatted to a width specified as number of characters. -t, --table Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the separator. Table output is useful for pretty-printing. -s, --separator separators Specify possible table delimiters (default is whitespace). -o, --output-separator separators Specify table output delimiter (default is two whitespaces). -x, --fillrows Fill columns before filling rows. -h, --help Print help and exit. ENVIRONMENT
The environment variable COLUMNS is used to determine the size of the screen if no other information is available. EXAMPLES
sed 's/#.*//' /etc/fstab | column -t BUGS
The util-linux version 2.23 changed -s option to be non-greedy, for example: $ printf "a:b:c 1::3 " | column -t -s ':' old output: a b c 1 3 new output (since util-linux 2.23) a b c 1 3 SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. AVAILABILITY
The column command is part of the util-linux package and is available from util-linux October 2010 COLUMN(1)

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LSNS(8)                                                        System Administration                                                       LSNS(8)

lsns - list namespaces SYNOPSIS
lsns [options] [namespace] DESCRIPTION
lsns lists information about all the currently accessible namespaces or about the given namespace. The namespace identifier is an inode number. The default output is subject to change. So whenever possible, you should avoid using default outputs in your scripts. Always explicitly define expected columns by using the --output option together with a columns list in environments where a stable output is required. Note that lsns reads information directly from the /proc filesystem and for non-root users it may return incomplete information. The cur- rent /proc filesystem may be unshared and affected by a PID namespace (see unshare --mount-proc for more details). lsns is not able to see persistent namespaces without processes where the namespace instance is held by a bind mount to /proc/pid/ns/type. OPTIONS
-J, --json Use JSON output format. -l, --list Use list output format. -n, --noheadings Do not print a header line. -o, --output list Specify which output columns to print. Use --help to get a list of all supported columns. The default list of columns may be extended if list is specified in the format +list (e.g. lsns -o +PATH). -p, --task pid Display only the namespaces held by the process with this pid. -r, --raw Use the raw output format. -t, --type type Display the specified type of namespaces only. The supported types are mnt, net, ipc, user, pid, uts and cgroup. This option may be given more than once. -u, --notruncate Do not truncate text in columns. -V, --version Display version information and exit. -h, --help Display help text and exit. AUTHORS
Karel Zak <> SEE ALSO
nsenter(1), unshare(1), clone(2), namespaces(7) AVAILABILITY
The lsns command is part of the util-linux package and is available from util-linux December 2015 LSNS(8)

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